Birds have air sacs and lungs. When birds
breathe (in / out,) oxygen-rich air fills the
lungs and air sacs. When birds breathe
(in / out), the oxygen-poor air leaves the
lungs, and stored fresh air enters the lungs from
the air sacs. This means that birds always have a
supply of oxygen-(rich / poor) air.
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Related Questions
01
5
A scientist would like to demonstrate that cells are the basic structural and functional unit of living organisms. Which of the following
experiments should she perform?
OA. add several seeds to pots with soil and monitor the growth of the plants
OB. observe whether organisms appear in a sealed container of broth after it is boiled
OC. observe samples of plant tissue under a microscope at a high magnification
OD. place individual cells in a Petri dish with food and monitor their ability to grow
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The experiment that she should perform is to observe samples of plant tissue under a microscope at high magnification. The correct option is c.
What is an experiment?A scientific experiment to compute or investigate the cause of scientific events. It is done with variables that are both control-independent and control-dependent. A scientific experiment is a container for a hypothesis and a process.
Variables can now be the components under research or variables that affect the component. A controlled scientific experiment will be managed by the scientist, and the time and face of the experiment will be examined.
Therefore, the correct option is C. observe samples of plant tissue under a microscope at high magnification.
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Answer:
D. place individual cells in a Petri dish with food and monitor their ability to grow
Explanation:
Which equation summarizes the process of respiration
Answers
Explanation:
i hope this helps you ok like
The vast fingerprint database held by the FBI can be scanned and is digitized by what instrument or technology?
Answers
Answer: computers.
Explanation: The database would cease to exist without the invention of computers and/or technology.
Why are lab safety rules important? I’m currently doing an essay with minimum of 250 words. You don’t really have to do that but can y’all give me some facts/ideas to put in my essay? Thank you and good day <3
Answers
Answer:
Explanation:
I know that Lab Safety Rules are important because laboratories have a wide array of safety hazards, which is why it is so important to understand the important of lab safety. By becoming familiar with the laboratory you're working in and always following proper safety procedures, you can help to prevent or eliminate hazards.
The Taiga is
A a cold, treeless, desert-like biome found near the North and South Poles.
B found mostly in Africa.
С a forest biome dominated by coniferous trees, such as pine, fir, and spruce.
D hot and dry sandy area
Answers
Answer:
Its A
Explanation:
I have the knowledge.
A mother with a blood type of A has a son with
a blood type of B. Which of the following are
possible? Select all that apply.
Answers
Answer:
b blood
Explanation:
In speech breathing inhalation happens because of
1. gravity
2. elasticity of the ribcage
3. muscle control
4. 1 and 2
Answers
The two main factors responsible for inhalation in speech breathing are the elasticity of the ribcage and muscle control. The elasticity of the ribcage is a passive process, while muscle control requires the contraction of the intercostal muscles and the diaphragm muscle. The correct answer is Option 2,3.
In speech breathing, inhalation happens because of the elasticity of the ribcage. The human ribcage consists of 12 pairs of ribs, which are joined to the spine at the back and breastbone at the front. The ribs are not solidly fixed to the breastbone but are connected by cartilage.
These cartilages are stretchy and can be pulled and pushed out, resulting in the chest cavity becoming larger and expanding in volume. This expansion creates a negative pressure, which sucks air into the lungs.
Inhalation also depends on the muscle control. Inhalation requires energy from the intercostal muscles, which expand the ribcage.
These muscles are located between the ribs and are important for breathing. When we inhale, the muscles contract, raising the ribcage, which increases the volume of the chest cavity.
The diaphragm muscle also plays a key role in inhalation. The diaphragm is a thin, dome-shaped muscle that separates the chest cavity from the abdominal cavity.
When we inhale, the diaphragm contracts and flattens, which expands the chest cavity, creating more space for the lungs to expand. This action results in the expansion of the lungs and the lowering of the pressure in the chest cavity.
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Microfilaments can be involved in contractions that change the shape of a cell when they are.
Answers
Microfilaments can be involved in contractions that change the shape of a cell when they are associated with motor proteins such as myosin.
Microfilaments- As they are made up of two entangled strands of the globular protein know as actin, microfilaments are also known as actin filaments. They are the tiniest filament of the cytoskeleton and polymers of a protein actin. They are essential for muscle contraction, cell division, and cellular mobility.
Myosin- The molecular motor known as myosin transforms the chemical energy supplied by ATP into mechanical energy. The actin filaments are subsequently pulled along by this mechanical energy, contracting the muscle fibers and resulting in movement.
The given question is incomplete, find below the complete question,
Q. Microfilaments can be involved in contractions that change the shape of: -
a cell when they are
a. Working with microtubules to bend cilia and flagella
b. Associated with motor proteins such as myosin
c. Complexed with intermediate filaments to form desmosomes
d. Being assembled from actin monomers
e. Associated with actin-associated proteins that are adding actin monomers to the "plus end" of the filament
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A triangle points down, 25 is below the triangle, 5 is to the right of the triangle, one dot, and 26 is above the triangle. Next to the triangle is a solid circle with a single white line down the middle. Lines in the shape of an F extend from the top of the circle, slightly left of the white line. 1010 is to the right with a negative 6 below it.
Fill in the blank to complete each statement.
The air pressure is ( ) millibars.
The temperature is ( ) degrees.
The dew point is ( )degrees.
Answers
Answer:
The air pressure is 1010 millibars.
The temperature is 26 degrees.
The dew point is 25 degrees.
Hope this helps :)
Answer:
1,010
26
25
( Hope this helps ) <3 ( Give person above brainliest )
The table below shows some characteristics of three different types of muscles.
Characteristics of Different Types of Muscles
Type A Muscles Type B Muscles Type C Muscles
Striations Yes Yes No
Found in digestive and urinary system No No Yes
Found in musculoskeletal system Yes No No
Which type of muscle is Type B? Cite the evidence from the chart to support your answer.
A Type B are skeletal muscles, because only skeletal muscles have striations.
B Type B are cardiac muscles, because they are not found in any other part of the body.
C Type B are skeletal muscles, because they are not part of the digestive system.
D Type B are cardiac muscles, because they do not tire easily.
Answers
Answer:
Option C
Hope it helps!!
which of these consumers might depend on plankton for its energy? krill orca rabbit seaweed PLEASE ANSWER ASAP
Answers
Answer:
Krill and orca are both consumers that depend on plankton for their energy. Krill are small, shrimp-like animals that are a major food source for many marine animals, including orcas. Orcas are large, apex predators that hunt in packs to catch krill and other small marine animals. Rabbits and seaweed are not consumers that depend on plankton for their energy. Rabbits are herbivores that eat plants, and seaweed is a plant that gets its energy from the sun.
Here is a table that shows the relationship between these consumers and plankton:
Consumer : Relationship to plankton
Krill: Plankton is a major food source
Orca: Plankton is a prey item
Rabbit: Plankton is not a food source
Seaweed: Plankton is not a food source
A lysozyme is an enzyme (a type of biological molecule) that catalyzes the destruction
of cell walls. It is found in high concentration in tears, saliva, and mucus. This enzyme
is considered an important part of our immune system. What type of immunity would
this fall under?
O specific immunity - the method used to destroy cell walls differs based on the pathogen
O non-specific - the enzyme destroys the cell wall of invaders
non-specific - the enzyme destroys the cell wall of specific bacteria
O specific immunity - tears, salvia, and mucus are specific to each pathogen
Please helpp
Answers
A lysozyme is an enzyme that catalyzes the destruction of cell walls. The type of immunity it will fall under is Non-specific - the enzyme destroys the cell wall of invaders.
The primary function of the lysozyme, a particular kind of enzyme, is to dissolve the bacterial cell wall. By dissolving bacterial cell walls, lysozyme is a general immune defence mechanism that aids in defending the body against a variety of bacterial illnesses. Instead of making a distinction between various diseases or germs, it assaults them all equally.
The immune system recognises and targets particular infections as part of specific immunity, also known as adaptive immunity. The same kind of focused response called specific immunity is not present generally in tears, saliva, or mucus, which are not unique to any one disease.
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What would happen to the bison population if a
drought caused many of the grasses in the prairie
ecosystem to die?
O A. The bison population would decrease
quickly
O B. The bison population would not change in
response to a change in the amount of
grasses.
C. The bison population would increase
quickly.
D. There is not enough information to form a
hypothesis about a change in the bison
population in response to a change in the
amount of grasses.
Answers
What is generally the site of cellular respiration?
Answers
Which FIVE factors are necessary for ecosystems
large amount of space
trees
nutrients
living organisms
predators
water
energy
oxygen
Answers
The five necessary factors for ecosystems are:
Living organisms: Ecosystems require populations of living organisms, such as plants, animals, fungi, and microorganisms, that interact with each other and their environment.Nutrients: Ecosystems require nutrients, such as carbon, nitrogen, and phosphorus, which are cycled through the ecosystem to support the growth and survival of organisms.Water: Ecosystems require water to support life, as it is essential for many biological processes and provides habitat for aquatic organisms.Energy: Ecosystems require a source of energy, such as sunlight or chemical energy, to power biological processes and maintain life.Space: Ecosystems require a physical space for organisms to inhabit and interact with each other and their environment.What is an ecosystems?
An ecosystem is a community of living organisms (plants, animals, and microorganisms) interacting with each other and with the non-living components (such as air, water, and soil) in their environment. The components of an ecosystem are interdependent, and the energy and nutrient flows between the biotic and abiotic components sustain the ecosystem. Examples of ecosystems include forests, grasslands, oceans, and freshwater bodies.
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When a species changes in response to change in the environment, we call this ______.
Answers
Answer: Adaptation
species adapt to their environment
Misting helps keep the plants?
Answers
Answer: AHAHAA BUM UR FAiling ur quiz LLL
Answer:
Misting houseplants is a very simple and effective way to boost humidity.
Explanation:
When should you mist plants?
The best time to mist your houseplants is in the morning before the sun gets high in the sky, typically between 7 and 9 a.m. The evening, after 5 pm is also a great time for misting.
timeline of genetics
Answers
Answer:
Explanation:
5000 BC
Demonstrating some understanding of inheritance, humans worldwide begin to selectively breed more useful varieties of livestock and crops, including wheat, maize, rice and dates
400 BC
Greek philosophers contemplate the mechanisms of human inheritance. Aristotle believes that traits acquired during life, such as injuries, can be passed to offspring. He also develops the theory of “pangenesis”, which attempts to explain how these traits are transmitted via particles called “gemules” to the reproductive cells
1859
Charles Darwin, himself a proponent of pangenesis, publishes On the Origin of Species – his explanation of evolution by natural selection. Darwin provides a plethora of evidence on how valuable traits become more common in a population, but does not provide any explanation for the mechanism of transmission of these traits
1866
Augustinian monk Gregor Mendel publishes his work on the patterns of inheritance in pea plants. His meticulous studies mark the birth of modern genetics. Mendel’s findings escape the notice of other researchers for over three decades
1882
Chromosomes are discovered by German biologist Walter Fleming, and named with the Greek prefix meaning “colour” because they become stained when cells are dyed
1902
Mendel’s research is rediscovered by botanists in 1900. US and German cell biologists then independently notice the link between Mendel’s “units of inheritance” and chromosomes. They conclude that hereditary information is contained within chromosomes
1905
The term “genetics” is created by British biologist William Bateson. The terms “gene” and “genotype” surface in 1909.
Sex chromosomes are discovered following work on butterflies and beetles
1910
US scientist Thomas Hunt Morgan is the first to discover a sex-linked trait, while studying the fruit fly Drosophila. The trait for eye colour, on the X chromosome, is also the first gene to be traced to a specific chromosome
1925
Studies show that X-rays can induce mutations in the genetic material
1944
A trio of US geneticists revisit work from the 1920s and prove that, in bacteria, DNA is the hereditary material, and not protein as was previously suspected
1951
Clear X-ray diffraction images of DNA are captured for the first time by British researcher Rosalind Franklin
1953
Building on Franklin’s work, biochemist James Watson and biophysicist Francis Crick at Cambridge University, UK, determine the now famous double-helix structure of DNA. They are awarded a Nobel prize in 1962 for their efforts.
1961
Crick and South African geneticist Sydney Brenner report that trios of DNA bases – called nucleotides – each hold the instructions for one of the 20 amino acids that combine to form proteins
1973
US researcher Herb Boyer uses enzymes to cut DNA and splice it into bacterial plasmids, which then replicate producing many copies of the inserted gene. This heralds the dawn of genetic engineering
1978
Genetically modified bacteria produce the hormone insulin
1983
The gene for an inherited disorder (Huntington’s disease) is mapped to a chromosome for the first time
1986
Kary Mullis in the US develops the Polymerase Chain Reaction (PCR), which allows researchers to produce many millions of copies of DNA molecules in just a few hours
1990
The international Human Genome Project begins, with the goal of sequencing the entire human genetic code
Gene therapy is used successfully for the first time, to treat a four-year-old girl with the rare hereditary immune disorder adenosine deaminase deficiency
1994
FlavrSavr tomatoes, genetically modified to have a long shelf-life is the first GM product to go on sale in the US. GM tomato puree goes in sale in the UK in 1996
1996
Baker’s yeast is the first (non-viral) genome to be completed, followed by the worm Caenorhabditis elegans in 1998 and then the plant Arabidopsis and fruit fly Drosophila in 2000
2000
Completion of the draft human genome is jointly announced by US firm Celera Genomics and the Human Genome Project (an international public consortium). The full sequence – comprising 30,000 to 40,000 genes – is completed in 2003
2003
A tropical fish that fluoresces bright red becomes the first genetically modified pet to go on sale in the US
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A study was conducted in a particular preschool to investigate whether there is a link between breastfecding and a child's level of intellectual functioning, 20 breastfed and 40 not breastfed (non-breastfed) four year old children were involved. Each child is allocated a unique ID number between 1 and 60 (inclusive). Each child had to answer a few basic questions. To motivate them to answer all questions, the investigator offered Whittaker's Miraka Kirīmi (chocolate) bar. (a) For each of the following scenarios, identify the named distribution that can be used to model X, including its parameter(s). i. Each day a randomly chosen child is given a chocolate bar. All 60 children are in the draw every day. Let X be the number of days before the child with ID number 1 is chosen twice. Note that the day on which the child with ID number 1 is chosen for the second time is not counted. [2 marks] ii. Five children are randomly chosen to sit around one table and do their test. Let X be the number of non-breastfed children chosen. [2 marks] (b) Refer to your choice of named distribution in 2(a)ii above and answer the following questions. i. Find the expected value of X,E(X), and the variance of X,Var(X). [2 marks] ii. What is the probability that at least one child in the group of five children chosen to do the test is breastfed? [2 marks]
Answers
The variance of X, Var(X), for the hypergeometric distribution, the formula is: 1.67
How to calculate the valueThe hypergeometric distribution has three parameters:central idea
N: the total population size (60 children in this case)
K: the number of success states in the population (40 non-breastfed children in this case)
n: the number of draws (5 children chosen in this case)
To calculate the variance of X, Var(X), for the hypergeometric distribution, the formula is:
Var(X) = n * (K / N) * ((N - K) / N) * ((N - n) / (N - 1))
Using the same values as before, we have:
Var(X) = 5 * (40 / 60) * ((60 - 40) / 60) * ((60 - 5) / (60 - 1))
= 1.67
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what pattern of hormone secretion would be observed in a patient with hypercortisolism if the tumor was in her anterior pituitary gland? assume that the tumor is over producing its normal product and the tumor cells do not respond to negative feedback signals.
Answers
Negative feedback signals is the pattern of hormone secretion caused by a tumor on the anterior pituitary gland, resulting in the overproduction of hormones.
In this case, the tumor produces hormones without responding to negative feedback signals. As a result, the patient's body will experience an increased secretion of hormones, leading to medical symptoms and conditions.
The hormones that are typically overproduced in this condition are cortisol, growth hormone, luteinizing hormone, follicle-stimulating hormone, and prolactin.
These hormones can cause the body to become resistant to insulin, leading to glucose intolerance and weight gain. Additionally, hypercortisolism can cause hypertension, osteoporosis, and infertility.
It is important to seek medical advice if you experience any of these symptoms as they can be indicators of hypercortisolism.
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Lab: Owl Pellets 3. What charts, tables, or drawings would clearly show what you have learned in this lab?
Answers
Food web diagram, frequency table, bar chart, skeleton identification chart, scatter plot.
What visual representations can be used to clearly convey the findings in an owl pellet lab?In a lab on owl pellets, several charts, tables, and drawings can be used to clearly present the findings and knowledge gained. Here are a few examples:
Food Web Diagram: A food web diagram can be created to show the relationships between various organisms in the ecosystem. It can illustrate the different trophic levels, including primary producers (plants), primary consumers (small mammals or insects), secondary consumers (owls), and decomposers (bacteria and fungi).Frequency Table: A frequency table can be used to display the types of prey found in the owl pellets and the number of occurrences of each prey item. This table can provide insights into the diet preferences of the owls and which prey items are more common.Bar Chart: A bar chart can be created to represent the frequency of different prey items. The x-axis can represent the prey species, and the y-axis can represent the number of occurrences or frequency. This chart allows for easy visualization of the most common prey items consumed by the owls.Skeleton Identification Chart: A chart or drawing that shows the skeletal structures of common prey species can be included. This chart can help in identifying and classifying the bones found in the owl pellets, allowing for a more detailed analysis of the prey composition.Scatter Plot: If there is additional data available, a scatter plot can be used to explore potential relationships between owl pellet size and prey consumption. This plot can show if there is a correlation between the two variables.These visual representations can effectively convey the findings and understanding gained from the lab on owl pellets.
They provide a clear and organized way to present the data and observations, facilitating better comprehension for the audience.
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which ions move into the synaptic bulb in order to move the vesicles containing neurotransmitter to the presynaptic membrane?
Answers
Calcium ions move into the synaptic bulb in order to move the vesicles containing neurotransmitter to the presynaptic membrane.
The tip of the axon terminal enlarges toward the end and acquires the name synaptic end bulb as it gets closer to the muscle fiber. The motor neuron's synaptic end bulb makes up the nervous system portion of the neuromuscular junction. The chemical transmitter acetylcholine (ACH) is pushed inside the synaptic cleft thereafter.
In the postsynaptic or post-junctional membrane, ACH diffuses across the synaptic cleft and binds to specific receptors. Synaptic vesicles in the end bulb are packed with a neurotransmitter molecule. A neurotransmitter is released into a little area called the synaptic cleft when a nerve impulse moves up the axon and arrives at the end bulb.
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A student was told that a drawing of a bacterial cell had been magnified 30 000 times. The lengthof the drawing was 45 mm.What was the actual length of the bacterium? (1mark)A) 0.15 mmB) 1.5μmC) 0.66 mmD) 0.66μm
Answers
The actual length of the bacterium is B) 1.5μm
What did Mr. Naidu share about what local communities were able to do with their river delta in coastal South India?
Answers
The thing that Mr. Naidu share about what local communities were able to do with their river delta in coastal South India is that For ten years or more, neighboring communities collaborated to rehabilitate over 20,000 acres of fish and shrimp farms, transforming them into flourishing mangrove forests.
What is the link?The presence of mangroves in close proximity to water bodies like rivers, estuaries, and tidal flats plays a significant role in providing a crucial living environment for fishing cats.
In South India's coastal areas, where mangrove ecosystems and river deltas are found, it is likely that nearby communities have had the opportunity to encounter and witness fishing cats in their native environments.
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Every living organism is able to complete the process of glycolosis. true or false
Answers
Answer:
nearly all living organisms carry glycolosis
A man has the A blood phenotype and his wife has the B blood phenotype. Their son has the O blood phenotype. Could this man be the father of this child
Answers
Answer:
NO
Explanation:
They would have formed AB blood type not O.
the first one who answered it correctly will get brianlist plz help
Answers
How do heterotrophs get their source of glucose?
Answers
Answer:
By consuming plants and animals.
Explanation:
Since plants are autotrophs, they absorb the sun's energy through photosynthesis and make glucose. herbivores (plant eating heterotrophs) then consume these plants and gain energy from the glucose and further up the food chain carnivores consume herbivores and also gain a bit of glucose from them.
Draw a hypothetical graph showing the growth progression of
lactic acid bacteria and coliforms in a successful Pickled Mustard
Greens fermentation. Also, properly label the graph.
Answers
A hypothetical graph showing the growth progression of lactic acid bacteria and coliforms in a successful Pickled Mustard Greens fermentation is properly labeled and is used to explain the relationship between the two microorganisms.
Lactic acid bacteria and coliforms are two of the many microorganisms that are involved in the process of Pickled Mustard Greens fermentation. Lactic acid bacteria are the main microorganisms involved in the Pickled Mustard Greens fermentation, while coliforms are considered indicators of fecal contamination. During the Pickled Mustard Greens fermentation, lactic acid bacteria increase while coliforms decrease in number. This is because lactic acid bacteria utilize the available sugars and nutrients in the brine to produce lactic acid.
The lactic acid produced by the lactic acid bacteria inhibits the growth of coliforms, leading to their decrease in number. A hypothetical graph showing the growth progression of lactic acid bacteria and coliforms in a successful Pickled Mustard Greens fermentation is shown below. The graph is properly labeled with the x-axis representing time, the y-axis representing the number of microorganisms, and two lines representing the growth progression of lactic acid bacteria and coliforms.
Lactic acid bacteria increase while coliforms decrease in number during the Pickled Mustard Greens fermentation. This is due to the production of lactic acid by the lactic acid bacteria which inhibits the growth of coliforms.
A hypothetical graph showing the growth progression of lactic acid bacteria and coliforms in a successful Pickled Mustard Greens fermentation is properly labeled and is used to explain the relationship between the two microorganisms.
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I have some pet fowl. They are all ducks but two, all geese but two and all chickens but two. How many fowl do I have.
Answers
Answer:
6 fowls
Explanation:
It is given that I have some fowls as pets.
Fowls are birds that belong to one or more biological orders. It may contains, hens, ducks, geese, chicken, and many more.
I have two ducks as my pet, two geese and two chickens in my fowl collection at home.
So the total number of fowls I have are = 2 ducks + 2 geese + 2 chickens
= 6