Answer:
A model organism is a species that has been widely studied, usually because it is easy to maintain and breed in a laboratory setting and has particular experimental advantages. Model organisms are non-human species that are used in the laboratory to help scientists understand biological processes
Explanation:
State 10 characteristics of class Mammalia
Which of the following about the plasma membrane is not true?
a. It is made of lipid molecules b. It protects the cell's cytoplasm
c. It contains proteins d. It contains most of a cell's DNA
d. it contains most of the cells DNA
The folowing about the plasma membrane is not true is that It contains most of a cell's DNA. Correct Option is 4.
The plasma membrane, also known as the cell membrane, does not contain most of a cell's DNA. The DNA of a cell is primarily found within the nucleus in eukaryotic cells, or in the nucleoid region in prokaryotic cells. The plasma membrane, on the other hand, forms the outer boundary of the cell and separates the internal contents (cytoplasm) from the external environment.
It plays a role in protecting the cell, regulating the movement of substances in and out of the cell, and facilitating communication with neighboring cells. The plasma membrane is primarily composed of lipid molecules (option a) arranged in a phospholipid bilayer, along with various proteins (option c) that have diverse functions in cell signaling, transport, and structural support.
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How are novel variations added to a population?
When a true-breeding blue salamander is mated to a true-breeding red salamander, 100%of the offspring are blue. Assuming that salamander skin color is determined by a singlegene, which of the following statements are correct?A. The blue allele is dominant to the red alleleB. The red allele is recessive to the blue alleleC. The blue gene is dominant to the red geneD. The red gene is recessive to the blue geneE. Both A and BF. Both C and D
Answer:
Both A and B
Explanation:
True breed is a breed that is 100% identical with the parent, the traits inherited from that parents are 100% controlled by same allele of a gene hence they are exact copy.
A single gene can have several alleles, it is the allele that combines together that determines what is seen or expressed.
Allele for blue colour is dominant over allele for red color and that is what led to the phenotypic appearance of the offspring which is blue and the red color is masked. Also, because they are true breeds it means the genotype have the same allele e.g. AA
LITERALLY DOES ANYONE UNDERSTAND THIS??????
Answer:
understand what?
Explanation:
I think you forgot to add an attachment
When the concentration of a substance higher on one side of the cells selectively permeable membrane, certain molecules may move by osmosis or diffusion through the membrane without the cell using any energy. This process is called
A.passive transport
B.active transport
C. Mitosis
D. Replication
Answer:
A.
Explanation:
osmosis and diffusion are both passive transport bc it doesnt require energy and only moves down cocentration gradient, never against concertration gradient. Give me a brainliest if i helped! ♡
When certain molecules may move by osmosis or diffusion through the membrane without the cell using any energy, the process is called passive transport.
When diffusion takes place between compartments separated by a membrane permeable to that solute, it is called simple diffusion.
Passive transport does not require any additional energy other than the movement of the molecules, moving these in favor of their concentration gradient.
In other words, simple diffusion does not require ATP expenditure, since it is a spontaneous phenomenon.
The molecules that are mobilized by simple diffusion through the membrane are the nonpolar and small, the fat-soluble and the small polar ones, but without a net electric charge, such as H2O.
In the particular case of H2O, passive transport is called osmosis, the passage of water through the membrane by osmosis always takes place spontaneously and very quickly.
H2O will diffuse from the compartment with the lowest concentration of solutes or hypotonic medium, to the compartment with the highest concentration of solutes or hypertonic medium, in such a way as to equalize the concentrations in both compartments.
Therefore, we can conclude that when certain molecules may move by osmosis or diffusion through the membrane without the cell using any energy, the process is called passive transport.
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there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years (in fact, over 99% of all species that ever existed are now extinct!). given these facts, why do we care if human activity is driving other species extinct as we grow?
Answer:
This is because humans are causing species to go extinct at a faster rate than the normal rate.
Explanation:
It is documented that there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years. Some may say even if nothing is done there would still be extinction of this species which is true.
We care if human activity is driving other species extinct as we grow because humans are causing species to go extinct at a faster rate than the normal rate.
Minerals regulate body fluids, assist in various body functions, contribute to growth, and aid in building tissues. True False
which statement best explains a way in which a cell gets rid of waste?
Explanation:
A.They filter waste and extra water from blood so they can create urine, which is removed from the body.
The statement that best explains the way in which a cell gets rid of waste is that the secretory vesicle/ transport vesicle fuses with the plasma membrane and releases its content outside the cell.
What is exocytosis?Exocytosis is the process of secretory vesicles fusing with the plasma membrane, resulting in the extracellular release of vesicle content.
What occurs during exocytosis?It leads to integration of new proteins and lipids into the plasma membrane.Release of the content of secretory vesicle to extracellular medium.To learn more about secretory vesicle, vacuole, exocytosis and transport vesicle here,
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In multicellular organisms, such as human beings, cells combine to form tissues, which combine to form organs, which combine to form organ systems, which all together make up the organism and enable it to function. This is an example of which theme in biology? Select one:
a. structure and function
b. unity and diversity
c. regulation
d. levels of organization
Explanation:
structure and function
Answer:
d
Explanation:
what units would you use to measure a red blood cell
Which statement about vacuoles is true? Only plant cells contain vacuoles. Only animal cells contain vacuoles. Vacuoles are larger in plant cells than in animal cells. Vacuoles are larger in animal cells than in plant cells.
Answer:
Vacuoles are larger in plant cells than in animal cells
Answer:
vacuoles are larger in plant cell than in animal cell
What is the role of the nervous system in digestion? (1 point)
O to provide enzymes
O to provide electrical signals to initiate peristalsis
to provide passage of nutrients throughout the body
O to provide oxygen
The role of the nervous system during digestion is to provide electrical signals to initiate peristalsis.
Peristalsis is a series of smooth muscle contractions which are capable of moving foods through the digestive tract.This movement (peristalsis) is controlled by the autonomic enteric nervous system, which is one of the main divisions of the autonomic nervous system (ANS).In conclusion, the role of the nervous system during digestion is to provide electrical signals to initiate peristalsis.Learn more in:
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Elephants diet reactants and products
what a dependent variable
A. diretly change by the experimenter
B. manipulated by charges to the independent variable
C. a variable that is kept constant
D. a variable that is used as a control
Answer:
The correct answer would be B, manipulated by changes to the independent variable.
Explanation:
I hope this helps:)
Which of the following would be the MOST dangerous consequence if humans depleted the world’s timber supply?
Answer:
No oxygen
Explanation:
we wouldn't be able to breath, cause without the trees there would be no oxygen
What phrase describes a good scientific question?
has a wide focus
addresses a gap in knowledge
does not lead to a testable hypothesis
has a simple yes or no answer
Answer:
addresses a gap in knowledge
Explanation:
Every scientific experiment begins with an observation or a question. This question is called a scientific question. A scientific question is a question that helps the scientist or experimenter get to the root of an investigation, like a head start. One important character a scientific question is that it must be able to be tested via experimentation.
In this question, the phrase that best describes a good scientific question is that it should ADDRESS A GAP IN KNOWLEDGE. This means that it should aim at filling a void or contribute to knowledge.
Answer:
The question relies on moral or social values. (d)
Explanation:
Edge 2020 the other guy is wrong
When you consider the present and/or past environment of Mars, could you find all the requirements for life?
Answer:
no
Explanl
l vidaal atiense
1. What happens to our body when we are exposed to temperature extremes? What do we do to control our internal temperature?
Explanation:
when we are in heat our body companciates with surrounding by profusely sweating
we can control our internal temperature by escape in time from heat and
The Karez well system _______.
a.
was the first known use of wells
b.
was a postindustrial system
c.
transported groundwater from a distance
d.
all of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
c. transported groundwater from a distance
Explanation:
Which is a basic characteristic of all living cells?
cell wall
protein coat
energy metabolism
antibiotic resistance
Answer:
Energy Metabolism
Explanation:
In order to a living cell you need to be able to reproduce, have energy metabolism, etc.
This is a basic characteristic of all living cells called as the energy metabolism.
What is the Energy metabolism ?
Energy metabolism refers to all of the reactions worried in producing adenosine triphosphate (ATP) from nutrients, such as each cardio respiration (oxygen present), anaerobic respiration (fermentation) in addition to fatty acid and amino acid metabolism.
The residing cells of each organism continuously use strength to live to tell the tale and grow. Cells ruin down complicated carbohydrates into easy sugars that the cell can use for strength. Muscle cells can also additionally patron strength to construct lengthy muscle proteins from small amino acid molecules.
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What is the definition hereditability?
Which is true of studies of height in children from around the
world?
Ethnic origin is a stronger predictor than socioeconomic status.
O Socioeconomic status is a stronger predictor than nutrition.
O Later-born children are generally taller than first-born children.
O Children from a rural area are generally taller than children from
an urban area
Answer:
the first one is right..
Oh Scientists are using a control sample that is known to be from bighearted carp in an EDNA surveillance study. What purpose does this control serve?
Answer:
d
Explanation:
DNA has become a boon in surveillance programs that is used to monitor the presence of invasive species in the aquatic system and can monitor the presence of nucleic acid water even if the animals are not there
Someone please help me , my work is due tomorrow. How does a Volcano effect the availability of natural resources? ( including food webs, energy, matter, etc.)
Answer:
Explanation:
Earthquake smoke fires ash falling from the sky
2. What are the largest groups of water animals
Answer:
a cetaceans whales and stuff
Explanation:
There huge
In her studies of chimpanzee behavior, Jane Goodall collected both qualitative
and quantitative data. Which of the following is an example of quantitative data?
(From Topic: 1.3 In studying nature, scientists form and test hypotheses)
An example of quantitative data is mothers and their infants typically nap for two to three hours each afternoon. Therefore, option A is correct.
What is quantitative data ?The data expressing a certain quantity and amount or range is called as quantitative data. The two main types of quantitative data are discrete data and continuous data.
The difference between the qualitative data and quantitative data is the quantitative data is numbers-based, countable, or measurable while qualitative data is interpretation-based, descriptive, and relating to language.
In her studies of chimpanzee behavior, Jane Goodall collected both qualitative and quantitative data. Therefore, An example of quantitative data is mothers and their infants typically nap for two to three hours each afternoon.
Thus, option A is correct.
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Your question is incomplete, probably your question was
In her studies of chimpanzee behavior, Jane Goodall collected both qualitative
and quantitative data. Which of the following is an example of quantitative data?
(From Topic: 1.3 In studying nature, scientists form and test hypotheses)
A. Mothers and their infants typically nap for two to three hours each afternoon.
B. baiting the animals with bananas helped to attract them close enough for her to observe their social behavior and to photograph them.
C. researchers have observed chimpanzees using more than half a dozen tools for assorted purposes.
D. Other animals, including some birds and dolphins, are now known to use tools.
One difference between plant and animal cells is that (1) plant cells have cell walls; animal cells don't (2) plant cells can't move; animal cells can (3) plant cells live in water; animal cells don't ( 4) plant cells have a nucleus; animal cells don't (5) plant cells have vacuoles; animal cells don't
Answer:
1) Plants cells have cell walls; animal cells don’t.
Explanation:
Cell walls function is to help cells stick to each other, which is good for plants since they don’t move around. But as for animal, they need to move around so it’s not good for them to have it.
Without cell walls, animal cells can take on different shapes!
It makes it able to move easier, flexible.
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What is the independent variable in this hypothesis, " Palo verde trees experience more growth during years with higher rainfall"?
Answer:
AMOUNT OF RAINFALL
Explanation:
The independent variable in an experiment is the variable that the scientist/experimenter manipulates or changes in order to bring about a response in the dependent variable.
In this case, the independent variable is the AMOUNT OF RAINFALL that the Palo verde trees were exposed to. This is because the amount of rainfall received is what is changed in this experiment while the growth of the Palo verde trees is the dependent variable, which is dependent on the amount of rainfall received (independent).
Answer the question below (This is just a test!!)
Answer:
We make big decisions in life. Like cooking, fabric, eating, oils we use. Tooth paste, brush, shampoo and conditioner. People come up with experiments. Just normally everything we do in life is similar to what scientists do.