i will give brainliest to whoever can answer this science riddle first and accurately :)
I’m at the beginning of earth’s timeline, but at the end of life’s start. I was there when a T-rex began, but in the middle of it’s asteroid end. What am I?
Answers
I believee it's the Cretaceous Period?
All of the dinosaur periods are at the start of Earth's timeline, and "the end of life's start" suggests the end of dinosaurs, meaning, when the asteroid hit. So it's probably one of the Mesozoic periods.
The T-rex first appeared in the Cretaceous Period, and the asteroid hit somewhat during middle of the Cretaceous Period.
I hope I'm right, and I hope this helps!
Related Questions
What do I do when this happen???
Answers
and talk to your teacher if it doesn’t work.
*VOCABULARY*
Which of the following is not related to metallic bond?
A. Alloy
B. Shared electrons
C. Transferred electrons
D. Sea of electrons
Answers
Shared electrons is not related to metallic bond.
Positively charged metal ions and the electrons that surround them are attracted to one another, creating metallic bonds. Covalent and ionic bond electrons are shared, but metallic bond electrons are delocalized.
What about metallic bond?Atoms in a metallic substance are held together by a force called the metallic bond. Atoms in such a solid are packed closely together.The attraction between positively charged metal nuclei and their delocalized valence electrons causes metallic bonding, a type of chemical bonding between two or more metal atoms.Metallic bonding is particularly prevalent in minerals involving transition metals. In most cases, the outermost electron shell of each of the metal atoms overlaps with a significant number of neighboring atoms. Minerals with metallic bonding include gold, silver, and copper. Metallically bound compounds are efficient heat and electricity conductors because valence electrons can travel freely throughout the structure. Strength, malleability, ductility, thermal and electrical conductivity, opacity, and brilliance are a few qualities of metallic bonding. These features serve as important findings to define metallic bonding. Electrostatic attraction between metal captions and delocalized electrons produces metallic bonds. Many of the physical characteristics of metals, like conductivity and malleability, are explained by the type of metallic bonding that exists.Learn more about metallic bonds here:
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What biometrics are measured to determine growth in a forest?
Answers
Answer:
In forestry, it encompasses the determination of dimensions, form, weight, growth, volume, health and age of trees, individually or collectively.
in reproduction, genetic information comes from only one parent; whereas, in reproduction, genetic information from two parents unites to form an offspring.
Answers
In asexual reproduction, genetic information comes from only one parent; whereas, in sexual reproduction, genetic information from two parents to form an offspring.
What is asexual reproduction?Asexual reproduction is a type of mechanism by which only one parental organism may produce offspring and therefore it is not associated with the formation of gametes.
In sexual reproduction, the cells from different parents having half genetic material fuse to produce an egg that will develop into an adult organism by a process known as fertilization.
The different types of asexual reproduction in organisms include, among others, vegetative propagation, binary fission (bacteria), Budding, fragmentation division, reproduction by spores (sporogenesis), etc.
In conclusion, in asexual reproduction, genetic information comes from only one parent; whereas, in sexual reproduction, genetic information from two parents to form an offspring.
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write one report in 300 words explaining any of the following topics listed below. Please no plagiarism. Please helppp
Answers
Viruses and bacteria are two types of microorganisms that can cause disease in humans and other animals. While they share some similarities, they also have many differences in terms of their structure, replication, and the ways in which they cause disease.
Bacteria are single-celled organisms that come in many different shapes and sizes. They can be either beneficial or harmful to humans, depending on the species and the circumstances. Some bacteria live in the human gut and help to digest food, while others can cause infections such as strep throat, pneumonia, and meningitis. Bacteria have a cell wall that provides structural support and protection, and they reproduce through a process called binary fission, in which one cell divides into two identical cells.
Viruses, on the other hand, are not technically alive, as they cannot replicate or carry out metabolic processes on their own. Instead, they rely on host cells to reproduce and spread. Viruses are made up of a core of genetic material (either DNA or RNA) surrounded by a protein coat called a capsid. Some viruses also have an outer envelope made up of lipids. Viruses attach themselves to host cells and inject their genetic material into the cell, which then takes over the host's machinery to produce more virus particles.
While bacteria can cause disease by invading and damaging host tissues, viruses typically cause disease by hijacking host cells and using them to produce more virus particles. Some common viral infections in humans include the common cold, flu, and HIV.
Both bacteria and viruses can be treated with antibiotics or antiviral medications, but these treatments can be less effective or even ineffective if the microorganism has developed resistance to the medication. Prevention measures such as vaccinations and good hygiene practices are often the best way to control the spread of these microorganisms.
In summary, bacteria and viruses are two distinct types of microorganisms that can cause disease in humans and animals. Bacteria are single-celled organisms with a cell wall that can reproduce through binary fission, while viruses are not technically alive and rely on host cells to replicate. Understanding the differences between these microorganisms is essential for preventing and treating infectious diseases.
Ostriches have wings similar in form to those of their ancestors, but that do not allow the birds to fly.
Answers
Answer:their weight
Explanation:
Ostriches weigh more than 400 pound and can be as tall as 9 feet.....making it 99.9% impossible for its flight......
Hope it helped?
Put these steps for how cancer cells multiply and spread in the correct order sequence.
1. Cells multiply and form metastases
2. Tumor in epithelium
3. Cells travel through bloodstream and may eventually adhere to the capillary wall in the liver or other organs
4. Cells break through base of epithelium to invade capillary
Answers
The correct order sequence for how cancer cells multiply and spread is as follows 2, 4, 3, 1.
The process of cancer cell multiplication and spread follows a specific sequence. It begins with the formation of a tumor in the epithelium, which is the first step mentioned in option 2. As the tumor grows, cancer cells have the potential to invade nearby tissues. This occurs when the cancer cells break through the base of the epithelium, as stated in option 4. Once they invade the surrounding tissues, cancer cells can enter the bloodstream and travel to other parts of the body. This is described in option 3, where the cells may adhere to the capillary wall in organs such as the liver. Finally, the cancer cells can multiply and form metastases, which are secondary tumors in distant locations from the primary tumor. This is the last step mentioned in option 1.
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A specific type of flower comes in red, white and pink colors. What pattern of inheritance is being followed? If you were to cross a pink flower with a white flower, what percent of your offspring would be red?
Answers
Answer:
Incomplete dominance, 0%
Explanation:
In incomplete dominance, the phenotypes of the dominant and recessive genes are blended. In this case, red and white are blended to create pink.
A Punnett square can be used to determine the phenotypes of the offspring of a white flower and a pink flower. In this case, we'll let "R" represent a gene for a red flower and "r" represent a gene for a white flower.
r r
R Rr Rr
r rr rr
The "Rr" genotype would result in a pink flower, and the "rr" genotype would result in a white flower. It is impossible for this cross to result in a red flower.
which trait would be most closely associated with high levels of mobility? incomplete metamorphosis germ layers cephalization a cuticle a body cavity
Answers
Cephalization would be most closely associated with high levels of mobility. It refers to the concentration of nervous tissue in the anterior, or head, end of an organism.
This allows for the development of advanced sensory organs, such as eyes and antennae, as well as a greater concentration of neurons and more advanced muscle coordination, which would enhance an organism's mobility.
Key points:
It is found primarily in animals, particularly in those with a bilaterally symmetrical body plan.It is an important adaptation for animals that need to respond quickly to their environment and move efficiently.Advanced cephalization is associated with the development of complex behaviors and higher cognitive functions.Learn more about cephalization here:
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When water is cooled, it becomes more dense and sinks to the bottom of the water column. The displaced water is them replaced with ___________.
more cold water from the North and south pole
warm water moving in from the equator
water that is roughly the same temperature as the displaced water
water from volcanic vents
Answers
B) warm water moving in from the equator
Which of the following characteristics are true for all cells?
all are true of cells.
ribosomes.
DNA.
a plasma membrane.
Answers
Answer:
all are true of cells
the plasma membrane controls what enters and leaves the cell
ribosomes are for protein synthesis which are used for many things such as repair and growth of cells
DNA contains genetic material which carries out instructions for the cell to function and survive.
DNA is located in the nucleus for eukaryotes, but DNA is located in the nucleoid which lacks a membrane and plasmids/loops of DNA in prokaryotes
The following characteristics are true for all cells:
DNAPlasma membraneTherefore, the correct options are C and D.
DNA (deoxyribonucleic acid) is the genetic material found in all cells. DNA contains the instructions necessary for the structure, operation and reproduction of the cell.
All cells are surrounded by a plasma membrane, also known as the cell membrane. The integrity of the cell is protected by the plasma membrane, which separates the cell from its surrounding environment and regulates the flow of substances into and out of the cell.
Therefore, the correct options are C and D.
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Your question is incomplete, most probably the complete question is:
Which of the following characteristics are true for all cells?
all are true of cells.ribosomes.DNA.a plasma membrane.Darwin's Hypothesis of Evolution by Natural Selection included the observation that populations often grow faster than the food supply and therefore individuals need to compete for resources. Darwin borrowed this idea from the work of:
Answers
Answer:
Thomas Malthus on his essay on population.
Explanation:
Malthus concluded that human population grow faster than the available resources in their environment.However,no matter how this population increases,selection pressure like famine,natural disasters,always keep the population in check,thus maintaining the population size within moderate levels.
He believed the weakest in the population (with little resistance to the selection pressure) will die,thereby reducing the population, encouraging the survival of the fittest,and stabilizing and preventing expulsion.
Darwin, assumed that the surviving organisms in the population must have inherited certain characteristics/traits from their parents,which make them to resist the selection pressures.He called the surviving ones the survival of the fittest by natural selection.
A mother with type AB blood and a father who is homozygous type B blood have a child. If we assume that all parties are Rh- what is the probability that the mother will be able to donate blood to her child if needed?
Answers
Answer: There is a 50% chance
describe the interactions between organisms and the environment.
Answers
Answer:
they help it thrive and live because it just goes in a circle sun grows plants plants feed herbivores, herbivores feed omnivores then it eventually gets to the top of the food chain and when the top of the food chain dies it decomposes and gives the ground fertilizer and starts all over again
Explanation:
because it is the circle of life
what change in renal regulation of h would help compensate for a metabolic acidosis? select 2 correct answer(s) question 18 options: a decrease in the filtered load of organic molecules an increase in the production of new plasma hco3- an increase in the secretion of h a decrease in the tubular production of ammonia
Answers
The change in renal regulation of \(HCO_3-\) that would help compensate for a metabolic acidosis is an increase in the secretion of \(HCO_3-\). Option 2 is Correct.
When the body experiences a metabolic acidosis, the kidneys work to compensate by excreting more bicarbonate ( \(HCO_3-\)) into the urine. This helps to increase the concentration of \(HCO_3-\) in the blood and restore the body's pH to normal.
The other options listed are not accurate compensatory mechanisms for a metabolic acidosis. A decrease in the filtered load of organic molecules, an increase in the production of new plasma \(HCO_3-\), an increase in the tubular production of ammonia, and a decrease in the production of new plasma H+ are not effective mechanisms for restoring the body's pH balance in a metabolic acidosis. Option 2 is Correct.
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Correct Question:
what change in renal regulation of h would help compensate for a metabolic acidosis?
1. a decrease in the filtered load of organic molecules
2. an increase in the production of new plasma hco3-
3. an increase in the secretion of h
4. a decrease in the tubular production of ammonia.
When does DNA replication occur within the cell cycle?
Answers
Answer:
Interphase
Explanation:
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.
pls help im struggling i’ll give branliest
Answers
Its d if not im so very sorry
biological controls are frequently used to replace persistent chemical pesticides. which of the following represents the greatest potential risk of using biological controls?
Answers
The greatest potential risk of using biological controls is the possibility of the biological control agent becoming a pest itself and causing harm to non-target species.
Biological control is the use of living organisms to control pests and pathogens. It involves introducing natural enemies of a pest species, such as predators, parasites, or pathogens, to reduce their population. This method is seen as a more sustainable alternative to chemical pesticides, as it relies on the natural relationships between species and helps to maintain a balance in the ecosystem. The goal of biological control is to suppress the pest population without causing harm to non-target species. However, there is always a risk that the biological control agent could become a pest itself, so careful consideration and monitoring are necessary.
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What are the biological controls that are frequently used to replace persistent chemical pesticides. which of the following represents the greatest potential risk of using biological controls?
Hershey and Chase started with a virus called a
. They used the radioactive isotope sulfur-35 to label the
of the virus and phosphorus-32 to label the
of the virus. They allowed the tagged virus to infect bacteria and studied the results. Hershey and Chase found that the only radioactive isotope within the bacteria was
. This result indicated that the genetic material inserted by the virus to infect the bacteria was
.
Answer Choices
DNA
bacteriophage
protein
32P
35S
Answers
Hershey and Chase started with a virus called a bacteriophage. They used the radioactive isotope sulfur-35 to label the protein of the virus and phosphorus-32 to label the DNA of the virus. They allowed the tagged virus to infect bacteria and studied the results. Hershey and Chase found that the only radioactive isotope within the bacteria was 35S. This result indicated that the genetic material inserted by the virus to infect the bacteria was 32P.
What is DNA?This is referred to as deoxyribonucleic acid and is the genetic material of living organisms.
Hershey and Chase showed that when bacteriophages, which are composed of DNA and protein, infect bacteria, their DNA enters the host bacterial cell, but most of their protein does not.This was why only radioactive isotope within the bacteria was 35S.
This result indicated that the genetic material inserted by the virus to infect the bacteria was 32P. This brought the conclusion that protein was not genetic material, and that DNA was genetic material.
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.
Answer:Bacteriophage
protein
DNA
32p
DNA
Explanation:
I got them all correct in realize
**A Punnett square should be used to find each answer.**
1. What is the chance that their child would have unattached earlobes? ¬¬¬_____
2. Beyonce has a straight hairline, which is a recessive trait. Bruno also has a straight hairline. What is the chance that their child would have a widow’s peak? _____
3. Beyonce has no dimples (Dd). Bruno has dimples, which is a recessive trait. What is the chance that their child would have dimples? _____
4. Beyonce has a cleft chin (CC). Bruno has a smooth chin, which is a recessive trait. What is the chance that their offspring would have a smooth chin? ____
5. Beyonce and Bruno are both heterozygous for brown eyes. What is the genotypic ratio for their offspring?
Answers
Answer:
100%
100%
50%
100%
75%
Explanation:
dont use the exact words so u can avoid plagerism lol
Complete dominance occurs when the dominant allele completely masks the recessive allele in heter0zyg0us individuals. 1) 100% / 2) no chance / 3) 50% / 4) no chance / 5) 1:2:1.
------------------------------------------------------------
Available data:
→ Six diallelic genes code for six different traits.
→ All genes express complete dominance, meaning that the dominant allele hides the expression of the recessive one.
→ Beyonce ⇒ ee ww Dd Hh cc Bb
→ Bruno Mars ⇒ ee ww dd Hh CC Bb
→ Cross: Beyonce x Bruno Mars
****************************
1) Earlobes
Parentals) ee x ee
Gametes) e e e e
Punnett square) e e
e ee ee
e ee ee
F1) 100% of the progeny is expected to have unattached earlobes, ee.
******************
2) hairline
Parentals) ww x ww
Gametes) w w w w
Punnett square) w w
w ww ww
w ww ww
F1) 100% of the progeny is expected to have straight hairline, ww.
There is no chance for their children to have widow’s peak because both of them are h0m0zyg0us recessive for the trait.
***********************
3) Dimples
Parentals) Dd x dd
Gametes) D d d d
Punnett square) D d
d Dd dd
d Dd dd
F1) 2/4 = 1/2 = 50% of the progeny is expected to have dimples, dd
2/4 = 1/2 = 50% of the progeny is expected to have no dimples, Dd.
***********************
4) Chin
Parentals) CC x cc
Gametes) C C c c
Punnett square) C C
c Cc Cc
c Cc Cc
F1) 100% of the progeny is expected to have cleft chin, Cc
There is no chance for their children to have smooth chin because one of them is h0m0zyg0us dominant and the other one is h0m0zyg0us recessive for the trait.
The whole porgeny is expected to be heter0zyg0us, Cc, expressing cleft chin.
***********************
5) Eyes
Parentals) Bb x Bb
Gametes) B b B b
Punnett square) B b
B BB Bb
b Bb bb
F1) 3/4 = 75% of the progeny is expected to have brown eyes, BB + Bb
1/4 = 25% of the progeny is expected to have blue eyes, bb
Genotypic ratio ⇒ 1:2:1Phenotypic ratio ⇒ 3:1-----------------------------------------------
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compare and contrast autosomal genes and sex linked genes
Answers
Answer:
Autosomal genes are genes located on any of the 22 non-sex chromosomes (autosomes). These genes affect both males and females equally and typically have dominant and recessive alleles that can be inherited from both parents. Sex linked genes are genes found on the X or Y chromosome. These genes are mainly inherited through the father and can lead to different phenotypes or characteristics in males and females. Autosomal genes have the same chance of being passed to either male or female offspring, whereas sex-linked genes are more commonly found in one gender.
Explanation:
you discover a green, filamentous multicellular eukaryote growing at the edge of a pond. how could you determine if the organism is a green alga or a plant?
Answers
To determine if the organism is a green alga or a plant, you could examine its reproductive structures. If the organism has specialized reproductive structures like flowers, it is likely a plant. If it reproduces asexually or has simple reproductive structures like unicellular spores or gametes, it is likely a green alga.
Green algae and plants are closely related groups of organisms that share many traits, such as cellulose-based cell walls and photosynthetic pigments. Plants, on the other hand, have a variety of adaptations that enable them to flourish on land, such as specialized reproductive organs, vascular tissue, and cuticles to stop water loss. Examining the organism's reproductive components is an excellent place to start when figuring out whether it is a plant or a green alga. Plants generate seeds using specialized reproductive structures like cones or flowers. While certain green algae may contain basic reproductive components like unicellular spores or gametes, green algae normally reproduce asexually. Examining the reproductive components of the organism, you can get an idea of whether it is a plant or a green alga.
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Identify 3 actions from humans that have released greenhouse gases into the atmosphere
Answers
Answer:
Explanation:
Humans are increasingly influencing the climate and the earth's temperature by burning fossil fuels, cutting down rainforests and farming livestock. This adds enormous amounts of greenhouse gases to those naturally occurring in the atmosphere, increasing the greenhouse effect and global warming
Please answer this question! Will mark as brainliest.
Describe 2 social, biological, and ethical implications of gene technologies for making therapeutic recombinant proteins. Come up with at least one of your own examples.
Answers
Answer: superweeds
Explanation:: “Gene pollution” of the environment resulting in “superweeds,” antibiotic-resistant microbes. Health effects of foods from GMOs. Allergenicity/adverse immune reactions/effectiveness of pharmaceutical compounds produced using rDNA technology.
I will give brainliest!!!! A plant is moved from direct sunlight and placed into complete darkness. Which structure in the plant's cells would be most affected by this change? Choose 1 answer: (Choice A) A Chloroplast (Choice B) B Mitochondria (Choice C) C Golgi body (Choice D) D Vacuole
Answers
Answer:
a
Explanation:
Which type of electromagnetic radiation is the primary cause of sunburns?
Radio waves
Ultraviolet rays
Visible waves
Rays
Answers
Answer:
Ultraviolet rays
Explanation:
These waves cause sunburns it's true...
have a good day
If an animal cell lacked centrioles, it would not be able to:
A) move.
B) synthesize proteins.
C) produce DNA.
D) metabolize sugars.
E) divide.
Answers
If an animal cell lacked centrioles, it would not be able to divide. (E)
Without centrioles, animal cells cannot properly divide. Centrioles are composed of microtubules and are located in the centrosome, near the nucleus. These structures are responsible for organizing the mitotic spindle and separating the chromosomes into two daughter cells during cell division. (E)
Centrioles also play a role in organizing microtubules during cell division, so that the chromosomes can be evenly distributed between the two daughter cells.
Without centrioles, microtubules cannot be formed properly, and therefore the cell cannot divide properly. Additionally, centrioles have no role in DNA production, so their absence does not affect the ability to produce DNA.
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When would a point mutation occur?
It can occur before and after cell division
Before the cell divides
After the cell divides
Before DNA replication
Answers
Answer:
The correct answer is option 1. Before and After Cell Division
Explanation:
Point mutations are frequently the result of mistakes made during DNA replication, although modification of DNA, such as through exposure to X-rays or to ultraviolet radiation, also can induce point mutations. But they may also occur after as well as before the division of a cell.
What are the main differences between near sighted and far sighted?
Answers
Myopia implies the capacity to see things close by with relative lucidity, while farsightedness is the capacity to just obviously see protests that are far away.
A person who is nearsighted can clearly see things close by, but they can't see things far away. The visual image is focused behind the retina rather than directly on it, resulting in farsightedness. It could be because the eyeball is too small or because the focusing power is too low.
The most significant distinction between them is the focal point of the images. Myopia, or nearsightedness, makes it easier for people to see things in the immediate area. Hyperopia, or farsightedness, makes it easier for people to see things in the distance. On the other hand, being nearsighted causes distant objects to appear blurry.
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Why must an organism be able to adjust to changing environments?
Answers
Answer:
blabkkbkkbcqcwwcqwqwwq
Explanation: