Identify two functions of mitosis.
Cells need to divide in order to maintain our bodies cell count and cell growth and cells in our bodies are
constantly dying and need to be replaced.
b. Consider a teenager going through puberty. Describe how cells in his body could be performing
each of the two functions you identified in part a.
Answer:
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What is the name of the special type of protein that helps reactions occur?
Some proteins lowers the activation energy of a reaction, making it more likely to proceed. The reaction will occur thousands or millions of times faster. The name of this special type of protein is enzyme.
seeds do not germinate until conditions are right. how does this compare with the hatching of a bird’s egg? what advantage does this adaptation give plants?
Just like an egg, plants need to find all the resources to grow and germinate. Some advantages of seeds are that they are more resistant, can be pollinated and allow for greater genetic variability.
What is the process of seed development?The process of seed development involves an orderly sequence of events. Among them are cell divisions, accumulation of reserves and loss of water. Seeds develop, undergo physiological rest, cryptobiosis, quiescence and dormancy.
Seeds are extremely important structures for the survival of plants in the terrestrial environment. They are responsible for protecting the embryo, in addition to ensuring the dispersion of species throughout the environment.
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The graph shows the results of a famous biological experiment. In the experiment, Kettlewell believed that the peppered moth demonstrated how environmental pressures influence evolution. He studied two areas. Birmingham was a rural wood, with natural conditions. Dorset was an urban, industrial area. The moths use tree trunks to camouflage themselves against birds, which are their major predators. Natural gene variations produce a light form of the peppered moth, and a dark form, meaning that they are not equally visible.
All BUT ONE statement is supported by Kettlewell's data. That is
Question options:
Dark moths had a survival disadvantage in industrial Dorset.
Light moths had a survival disadvantage in industrial Dorset.
Dark moths had a survival disadvantage in forested Birmingham.
Light moths had a survival advantage in forested Birmingham.
The statement not supported by Kettlewell's data is "Light moths had a survival disadvantage in industrial Dorset," while the other statements are supported by the experiment's results.
What statement is not supported by Kettlewell's data regarding the survival of peppered moths?The statement that Kettlewell's statistics does not support is: "Light moths had a survival disadvantage in industrial Dorset."Kettlewell's data showed that dark moths had a survival advantage in forested Birmingham, where the tree trunks were darkened by pollution, making the dark moths harder to spot by predators. In contrast, light moths had a survival advantage in forested Birmingham before industrialization when tree trunks were lighter in color.
In industrial Dorset, where pollution had darkened the tree trunks, Kettlewell found that dark moths had a survival advantage, as they were better camouflaged against the darker tree trunks. Light moths, on the other hand, had a survival disadvantage in industrial Dorset, as they were more visible to predators against the darkened tree trunks.
Therefore, all the statements except "Light moths had a survival disadvantage in industrial Dorset" are supported by Kettlewell's data.
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Complete Question
The graph shows the results of a famous biological experiment. In the experiment, Kettlewell believed that the peppered moth demonstrated how environmental pressures influence evolution. He studied two areas. Birmingham was a rural wood, with natural conditions. Dorset was an urban, industrial area. The moths use tree trunks to camouflage themselves against birds, which are their major predators. Natural gene variations produce a light form of the peppered moth, and a dark form, meaning that they are not equally visible.
All BUT ONE statement is supported by Kettlewell's data. That is
Question options:
Dark moths had a survival disadvantage in industrial Dorset.
Light moths had a survival disadvantage in industrial Dorset.
Dark moths had a survival disadvantage in forested Birmingham.
Light moths had a survival advantage in forested Birmingham.
What do you think can be done to stop human trafficking?
Please be honest and give at least a paragraph :)
Answer:
Be a conscientious and informed consumer. ... Encourage companies to take steps to prevent human trafficking in their supply chains and publish the information, including supplier or factory lists, for consumer awareness. Volunteer and support anti-trafficking efforts in your community.
Using a total of only five organs, design a digestive system that can absorb the maximum number of Calories from the apple. Describe your system below.
Answer:
Mouth, Small intestine, Large intestine, Rectum and blood capillaries
Explanation:
The five organs could be
A) mouth
B) small intestine: small intestine has three parts: the duodenum (attached to the stomach), the jejunum (the middle portion)
C) Large intestine
D) rectum and
E) placed capillaries and lymphatic vessels on the small intestine.
Digestion is a process in which breakdown of food molecules occurs, which provide nutrients to the body.
Digestion of an appleThe organs included in the digestion of an apple are :
Mouth: The apple cut down into smaller pieces by teeth. The saliva present in the mouth breakdown the starch present in the apple.Stomach: The stomach contain digestive juices like hydrochloric acid and other gastric juices. These juices mix with the apple.Duodenum : In duodenum, the breakdown of starch molecule happens.Ileum : Small finger like structure present in the organ called villi, which absorb sugar particles and vitamins and minerals present in the apple.Colon : The undigested waste travels through the colon and goes to another organ that is rectum.Rectum : The indigestive waste material went out from the body through rectum.These are the organs which can absorb the maximum number of Calories from the apple.
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Quantum mechanics is the study of nature at a very small scale,even smaller than an atom.This kind of study faces many limitations. Which is a practical way to overcome limitations in quantum mechanics
Dimples (D) are a dominant trait. Two parents with dimples have 3 children, one with dimples
and 2 with no dimples. Determine the genotypes of all the members of this family.
Answer:
Parent 1 genotype: Dd
Parent 2 genotype: Dd
Child 1 (dimples): Dd or DD
Child 2 (no dimples): dd
Child 3 (no dimples): dd
Explanation:
No dimples (d) - recessive
D (dimples) masks d (no dimples), therefore D (dimples) is expressed
TRANSLATE the mRNA into amino acids:
AUG CAC UGU CCU UUC GCU GAC CCC UAA
Answer:
sorry brojjjjhhhfdeewa
A student is doing a genetics experiment on beetles. A pure green beetle is crossed with a pure brown beetle. The student repeats this experiment ten more times. Every time the student performs this cross, all of the offspring are green. What can the student best conclude?
The correct answer is : All of their offspring i.e. F1 generation would be green colored (Phenotype) with Genotype = Gg.
According to Mendel's Law Of Inheritance , Because every beetle child has a green phenotype, the gene for green color dominates over the gene for brown color.
According to Mendel's Law Of Inheritance ,
The genotype of pure green beetle = GG
The genotype of pure brown beetle = gg
A pure green beetle is crossed with a pure brown beetle
GG × gg
The offspring will have genotype = Gg. i.e. F1 generation.
Therefore all the offspring would be of green colored (Phenotype) with Genotype = Gg.
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Which of the following organisms are prokaryotes?
1. plants
2. animals
3. bacteria
What is the importance of living systems?
make a in a sentence to uwuwpbrnjb
Atomic structure of carbohydrates
Answer:
Carbohydrates are biological molecules made of carbon, hydrogen, and oxygen in a ratio of roughly one carbon atom.
Explanation:
( Cstart text, C, end text) to one water molecule ( H 2 O \text H_2\text O H2Ostart text, H, end text, start subscript, 2, end subscript, start text, O, end text).
Explanation:
Carbohydrates are biological molecules made of carbon, hydrogen, and oxygen in a ratio of roughly one carbon atom ( Cstart text, C, end text) to one water molecule ( H 2 O \text H_2\text O H2Ostart text, H, end text, start subscript, 2, end subscript, start text, O, end text).
What is the difference between science and non-science? (3 points)
A. Science is absolute knowledge based on prediction and guessing
B. Science uses only absolute truths without evidence
C.There are no errors in science
D.Science looks for evidence of phenomena in the natural world
Answer:
d
Explanation:
science depends on facts. no guessing, no predictions
Answer: D
Explanation:
NEED HELP ASAP! Biology
An organism's body cells ALL have the same set of Genes
Genes can be blocked by Transcription Factors
Genes can be activated by Transcription Factors
Gene off: No transcription and/or translation ---> Gene Repression = No Protein(s)
Gene on - transcription- mRNA - translation ---> Gene Expression = Protein(s)
What are gene expression and gene repression?The mechanism by which a gene is activated in a cell to produce RNA and proteins is known as gene expression. It could be determined by examining the RNA, the protein produced from the RNA, or the function of the protein in a cell.
Gene repression is the process of turning off specific genes whose byproducts are required to keep a cell functioning, such as the creation of essential cofactors or enzymes. This is crucial if the end products of these genes are short-lived, degrade, or are digested.
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When making yogurt, bacteria and milk are mixed together and set in a warm area. The container is sealed and no gasses are allowed to enter the container. After 24 hours the container is opened, and there is still no gas. Upon tasting the mixture there is a tart flavor. What type of respiration were the bacteria most likely carrying out?
A.
photosynthesis
B.
alcoholic fermentation
C.
lactic acid fermentation
D.
aerobic cellular respiration
Answer:
When making yogurt the tart flavor get in the end is more likely because the bacteria have carried out a type of respiration named lactic acid fermentation (option C).
Explanation:
The process of obtaining yogurt from whole milk involves the association of the bacterial species Streptococcus and Lactobacillus. In order to carry out the lactic acid fermentation that produces yogurt, the bacteria act in a different way:
Streptococcus is in charge of removing the oxygen from the milk product.Lactobacillus promotes the conversion of lactose sugar into lactic acid.This fermentation process leads to the conversion of milk into a coagulated and tart flavor product.
Other options are not correct because:
A. Photosynthesis : is the process that occurs in plants to obtain chemical energy from sunlight.
B. Alcoholic fermentation: in this chemical process alcohol is obtained from the fermentation of a sugar.
D. Aerobic cellular respiration: does not involve fermentation, but the series of processes that convert glucose into energy.
In a data set, thAre claims about the effects of meditation most likely scientific or pseudoscientific?
scientific, because people have been claiming for thousands of years that meditation helps them
scientific, because observations of brain growth and chemicals are made carefully and repeatedly
pseudoscientific, because practices that are related to religion are based on beliefs and are subjective
pseudoscientific, because people have made claims about it but scientific observations have not been madee number that appears the most is called the
.
In a data set, the claims about the effects of meditation are most likely scientific because observations of brain growth and chemicals are made carefully and repeatedly.
Option B is correct.
What is pseudoscience?Pseudoscience can be referred to a term consisting of statements, beliefs, or practices that claim to be both scientific and factual but are incompatible with the scientific method.
In a data set, the claims about the effects of meditation are most likely scientific because observations of brain growth and chemicals are made carefully and repeatedly.
scientists have made claims about the effects of meditation and what it does to the brain with the results being shown in the recording of the brain activities. Therefore, we would say meditation is a scientific process.
pseudoscience on the other hand have made claims about meditations but scientific observations have not been made to back up the claims.
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Genes that code for a specific protein can be inserted into bacterial plasmids, and then the plasmids are used to transform cells. Many useful
human proteins are now synthesized by these transgenic bacteria. Uses for the synthesized proteins include human insulin used to treat
diabetes and human growth hormone used to treat dwarfism.
Which tenet of cell theory BEST serves as a basis for this type of biotechnology?
Answer:
The tenet of cell theory that BEST serves as a basis for this type of biotechnology is that all living things are composed of cells.
Cell theory states that all living things are composed of one or more cells and that the cell is the basic unit of life. In biotechnology, genes that code for a specific protein can be inserted into bacterial plasmids, which are small circular pieces of DNA found in bacteria, and then the plasmids are used to transform cells. The transformed cells can then produce the desired protein. This process is based on the understanding that all living things are composed of cells and that the genetic information necessary to produce specific proteins is contained within the cell's DNA. Without this understanding of the basic unit of life being the cell, it would not be possible to create transgenic bacteria to synthesize human proteins for medical use.
are phenols and glycosides induced or pre-existing defenses mechanisms for plants immunity ?
Phenols and glycosides are pre-existing defense mechanisms in plants' immune systems. These compounds are part of the plant's chemical defense arsenal and are present in various tissues even before any attack or infection occurs.
Phenols are secondary metabolites found in plants that have antimicrobial and antioxidant properties. They contribute to the plant's defense against pathogens by inhibiting the growth and development of microorganisms. Phenols also play a role in wound healing and lignification, which strengthen the plant's cell walls.
Glycosides are another class of secondary metabolites found in plants that have diverse functions, including defense against herbivores and pathogens. Some glycosides act as toxic compounds when ingested by herbivores, while others can inhibit the growth of microorganisms or interfere with their feeding behavior.
Both phenols and glycosides are produced by plants as part of their constitutive defenses, meaning they are present at baseline levels even in the absence of stress or attack. However, their production can be further induced or enhanced in response to specific stimuli, such as pathogen invasion or herbivore feeding.
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The sun has many different layers that describe its structure. In which layer is the temperature of the sun cooler than the core and dense enough that thermal radiation is sufficient to transfer the intense heat of the core outward?
A. photosphere
B. convection zone
C. radiation zone
D.photosphere
What Number block would weather faster?
Answer:
I believe the answer would be: block #3 would weather fastest.
Explanation:
If you have an ice block the size of block #1 and an ice block the size of an ice cube, and you put them each in the sun for the same amount of time, the smaller ice cube would melt first, because it has a smaller mass.
The same would happy for an ice block the size of block #1 vs 23 ice cubes. the 23 ice cubes would melt faster
I could be totally wrong, but that sounds like it makes sense, right?
Hope this helps! Happy holidays!
Not really a homework question, just curious because I couldn't find an answer on a search engine.
I found a small, 6 legged, black bug in my backyard. In fact, they are everywhere in my yard, it doesn't annoy me whatsoever. It is a harmless bug, as I have interacted with them before. Can anyone tell me what bug it is?
Answer:
palo verde beetle
Explanation:
this was the closest match to the beetles I saw I think it is also called a black carpet beetle.
What is it When cool air rushes in to replace warm air that has risen
1. Latitude
2. Longitude
3. Hemisphere
4. Equator
5. Wind
6. Sun
7. Poles
Match each species to its story of overexploitation.
a. Dodo
b. Canadian cod
c. Rothschild's orchid
d. Whales
e. Passenger pigeon
1. Multiple species were almost wiped out, but are slowly recovering after a moratorium on hunting them.
2. Once the most populous species of its kind in North America, these were hunted to extinction by 1901.
3. When sailors stocked its island with pigs, the pigs destroyed this species' ability to reproduce.
4. This species was almost wiped out by collectors who prized its rarity.
5. Once a major resource in Canada, the population crashed in the 1990s. Recovery is slow because they cannot reproduce until age 7.
Answer:
Explanation:
Dodo- When sailors stocked its island with pigs, the pigs destroyed this species' ability to reproduce.
Canadian cod- Once a major resource in Canada, the population crashed in the 1900s. Recovery is slow because they cannot reproduce until age 7.
Rothschild's orchid-This species was almost wiped out by collectors who prized its rarity
Whales- Multiple species were almost wiped out, but are slowly recovering after a moratorium on hunting them.
Passenger pigeon- Once the most populous species of its kind in North America, these were hunted to extinction by 1901.
Overharvesting and using natural reservoirs including plants and animals, when their breeding rate is declining, is called overexploitation.
The correct matches are:
A. Dodo- Option 3. When sailors stocked its island with pigs, the pigs destroyed this species' ability to reproduce.
The influx of new animals in their territory and habitat destruction was the cause of the extirpation of the Dodo bird.B. Canadian cod- Option 5. Once a major resource in Canada, the population crashed in the 1900s. Recovery is slow because they cannot reproduce until age 7.
They are now threatened species because of overfishing. Their breeding rate is also slow making them endangered species.C. Rothschild's orchid - Option 4. This species was almost wiped out by collectors who prized its rarity.
The area in which the plant species thrives is now cleared and the plants are wiped out by collectors.D. Whales- Option 1. Multiple species were almost wiped out, but are slowly recovering after a moratorium on hunting them.
Pollution, contamination and over whaling has led this variety to the verge of endangerment.E. Passenger pigeon- Option 2. Once the most populous species of its kind in North America, these were hunted to extinction by 1901.
Their habitat loss and overexploitation for their meat are the main causes for which they went obsolete.To learn more about overexploitation follow the link:
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The brain and spinal cord are part of the _______ nervous system. The electrical charges that act as nervous signals are called _______. Jellyfish do not have a brain. Instead their nervous system is called a _______. After nervous systems began to develop in bilaterally symmetric animals, some developed ventral, or front, nerve cords, while chordates developed _______ nerve cords. Skeletons that allow for movement by using muscles and squeezing liquid to change the body shape are called _______ skeletons. _______ do not grow with arthropods, and so occasionally must be shed and regrown from chitin. Muscles move endo- and exoskeletons by _______. _______ is the joining of two gametes called sperm and egg. A fish that lays her eggs in a cluster is initiating _______ fertilization. _______ are an adaptation by reptiles to allow for reproduction and embryo development on land. Describe three different strategies used by three different animals to thermoregulate. If you see a snake coiled up in a sunny patch of grass, what can you probably conclude about the type of thermoregulator it is. Why?
The brain and spinal cord are part of the central nervous system.
The electrical charges that act as nervous signals are called action potentials or nerve impulses.
Jellyfish do not have a brain. Instead, their nervous system is called a nerve net.
After nervous systems began to develop in bilaterally symmetric animals, some developed ventral nerve cords, while chordates developed dorsal nerve cords.
Skeletons that allow for movement by using muscles and squeezing liquid to change the body shape are called hydrostatic skeletons.
Exoskeletons do not grow with arthropods, and so occasionally must be shed and regrown from chitin.
Muscles move endo- and exoskeletons by contracting and relaxing.
Fertilization is the joining of two gametes called sperm and egg.
A fish that lays her eggs in a cluster is initiating cluster or mass fertilization.
Amniotic eggs are an adaptation by reptiles to allow for reproduction and embryo development on land.
Describe three different strategies used by three different animals to thermoregulate.
Elephants: Elephants thermoregulate by using their large ears as cooling devices. They flap their ears to increase surface area and enhance heat loss through evaporative cooling.Desert Lizards: Desert lizards employ behavioral thermoregulation by basking in the sun to absorb heat and warming their bodies. They also retreat to shade or burrows to avoid excessive heat when needed.Penguins: Penguins have a unique thermoregulation strategy. They huddle together in large groups to conserve body heat and shield themselves from the cold Antarctic winds, effectively reducing heat loss and maintaining body temperature.If you see a snake coiled up in a sunny patch of grass, what can you probably conclude about the type of thermoregulator it is. Why?
If you see a snake coiled up in a sunny patch of grass, you can probably conclude that the snake is an ectotherm. Ectotherms rely on external heat sources, such as the sun, to regulate their body temperature. By basking in the sun, the snake absorbs heat, which helps raise its body temperature to a suitable level for proper physiological functioning.
Answer:
1. central
2. action potential
3. nerve net
4. dorsal
5. hydrostatic
6. Exoskeletons
7. contraction/contracting
8. Fertilization
9. external fertilization
10. Eggs
11. Animals with fur thermoregulate by panting. Winged birds will flap against their mouths/heads to dissipate heat. Humans will produce sweat to evaporatively cool. Polar bears have developed blubber. Bears drop body temperatures during hibernation.
12. Seeing a snake using the warmth of the sun leads us to conclude that it is likely a thermo conformer that cannot produce its own body heat.
Alright guys :D
Jennifer observes a weather map showing tomorrow's weather. She predicts that air will travel from the low pressure system to the high pressure system, causing wind. The wind will carry moisture since it is coming from the ocean. Choose the statement which corrects the error(s) in Jennifer's prediction.
a weather map of Florida with an L to the left of Florida over the ocean and an H over the land
The wind from the ocean will not carry moisture.
The wind will travel from the high pressure system to the low pressure system.
Since the low pressure system is not over land, wind will not be created.
Wind is only created when two high pressure systems meet.
Jennifer looks at a forecast for tomorrow's weather. According to her forecast, wind will be caused by air moving from the high pressure system to the low pressure system. When the wind is coming from the ocean, it will carry moisture.
The movement of air caused by pressure differences is referred to as winds.
These pressure variations result from the sun's uneven heating of the earth. The equator receives very constant energy from the Sun because of the uneven form of the world. Yet, as latitudes north and south grow, the sun's warmth of the earth's surface becomes more unequal. Warm air rises to the atmosphere when it is heated.
There is a pressure difference as a result, and cold air descends to replace it. Winds are produced by this continuous air movement. From a high pressure system to a low pressure system, the winds are formed. The wind force increases with increasing pressure differential.
Air from the ocean replaces warm land air as it rises. Since the wind from the ocean is moist, it causes precipitation on land.
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The sequence below corresponds to the first 15 bases of the open reading frame of the E.coli cysS gene. For each of the following mutation sequences, determine the amino acid sequence encoded by the 15 bases, identify whether the mutation is a transition, transversion, insertion, deletion. Also identify whether the mutation is a missense, nonsense, silent or frame-shift mutation. 5' ATG CTA AAA ATC TTC a. 5' ATG CTA AAG ATC TTC b. 5' ATG CTA TAA ATC TTC c. 5' ATG CTA AAA AAT CTT d. 5' ATG CGA AAA ATC TTC
Answer:
a) silent mutation (Transition mutation )
b) nonsense mutation. (Transversion mutation)
c) frame-shift mutation ( insertion mutation )
d) missense mutation ( transversion mutation )
Explanation:
For 5' ATG CTA AAA ATC TTC
The WT sequence ; M L I K F
a) For 5' ATG CTA AAG ATC TTC
The Mutated sequence : M L K I F
The mutation here is a silent mutation i.e. Transition mutation takes places at the 9th position of the nucleotide sequence
b) For . 5' ATG CTA TAA ATC TTC
The Mutated sequence ; M L STOP
The mutation here is a nonsense mutation. that is a Transversion mutation as well
c) For 5' ATG CTA AAA AAT CTT
The mutated sequence is MLKNL
The mutation here is a frame-shift mutation ( i.e. also insertion mutation
d) For 5' ATG CGA AAA ATC TTC
The mutated sequence is MRKIF
The mutation here is a missense mutation ( i.e. also transversion mutation )
If 99% of the people who died in bicycle accidents were not wearing a
helmet, to the nearest whole number, how many people who died in
bicycle accidents in 2000 were wearing bicycle helmets?
The myelin sheath is made from
axons
terminal buttons
somas
glial cells
Answer:
The myelin sheath is made from glial cells. Specifically, it is made from two types of glial cells: oligodendrocytes in the central nervous system (CNS) and Schwann cells in the peripheral nervous system (PNS). These cells wrap around the axons of neurons to create the myelin sheath, which acts as an insulator and helps to speed up the transmission of nerve impulses.
Explanation:
The myelin sheath, a crucial component for rapid and efficient signal transmission in the nervous system, is composed of glial cells, not axons, terminal buttons, or somas.
Explanation:The myelin sheath is a fatty insulating layer that surrounds the axons of many nerve cells. It's not made of axons, terminal buttons, or somas, but rather, it's primarily composed of glial cells. Glial cells wrap around the axon of a neuron, creating a myelin sheath that accelerates the speed at which electrical signals, or impulses, pass along the axon. This myelination process is crucial for efficient and rapid transmission of signals across the nervous system. A neuron's terminal buttons, on the other hand, are located at the ends of the axon and are involved in releasing neurotransmitters, facilitating communication with other neurons.
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