A B-cell uses its surface antibodies as receptors to attach to specific antigens before they are taken in. By what mechanism does a B cell engulf an antigen
Answer:
[tex]\huge\boxed{\sf Endocytosis}[/tex]
Explanation:
B-cells engulf an antigen by endocytosis.
Endocytosis:
The process by which cell takes up external materials by fusing them with plasma membrane is called endocytosis.
After engulfing the antigen, B-cells become sensitive to the pathogen.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807How does the scientific method attempt to reduce observer bias when explaining natural phenomena?
Explanation:
The scientific method is focused on experiments to prove/disprove a hypothesis.
A number of experiments start with a question;example/ what caused mold to grow on human skin?
this is when u organize a "control group,"
( recieving a placebo, or told information they have to follow).
your second group, gets a medication or a scenario to prove the hypothesis is true or false.
once both sides document their findings, scientists discuss which one is true..
A person starts to eat a hamburger. As she takes a bite and chews, an enzyme called salivary lipase helps to begin the process of fat digestion. Which of these is the BEST description of the role of enzymes in digestion?
Answer:
Role of enzymes in the human body
Explanation:
The chemical reactions that keep us alive - our metabolism - rely on the work that digestive enzymes do. They help to accelerate (catalyze) chemical reactions in the human body.
In some cases, they can cause a chemical reaction millions of times faster than they would without them.
Important functions of enzymes:
Digestive enzymes help the body break down larger complex molecules into smaller ones such as glucose, so it uses them as fuel.
Every cell in our body contains DNA. Each time the cell divides, this DNA must be copied. The process is called DNA replication . Enzymes help in this process by developing the DNA helix and copying the information.
Liver enzymes break down toxins in the body.
Enzymes are especially needed for respiration, digestion, muscle and nerve function, among other important roles.
Answer:
C. Enzymes are proteins that speed up the process of chemcially breaking down food molcules.
Explanation:
i need an answer quick please
Offspring that result from crosses between parents with different traits.
A farmer has grown strawberries successfully for years in field A. He recently expanded the crop into previously unused land in fields B and
C. The yield from field B is comparable to A, but the yield from field C is inexplicably low. As a microbiome expert, what might you predict
about the soil of fields A, B, and C?
Given what we know, we can confirm that the soil in field C most likely lacks the presence of microbes that help plants grow or has a higher presence of microbes that are harmful to plant growth.
What does it mean for a microbe to promote plant growth?This would mean that the microbe in question has a symbiotic relationship with plants. Meaning that it promotes plant growth in exchange for nutrients from the plant, and both organisms will benefit, similar to microbes such as AM fungi.
Therefore, we can confirm that the soil in field C is likely to lack plant symbiotic microbes that are most likely found in fields A and B.
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Why is it necessary to have positive and negative controls in this experiment?
Answer:
It is necessary to have positive and negative controls in an experiment to ensure that the results are due to the independent variable.
Explanation:
I hope it will help you
Abiotic factors in an ecosystem might include one or more of the following: Question 4 options: Slug, ants, coyote, birds, armadillo, trees, grass, flowers and moss Air, water, soil, rocks, and fish Air, water, soil, and rocks Slug, ants, coyote, birds, and armadillo.
Answer:
abiotic basically means non-living organisms. therefore the answers are: air, water, soil & rocks
:)
7. What do you think it means when you hear the phrase "an organism is adapted to its environment"?
Answer:
an organism adapted to its environment means the organism has features that'll help them live/reproduce in the environment they're located in. hope this helps (～￣▽￣)～
Explanation:
Green algae are divided into two main groups, the charophytes and the __________.
Answer:
The green algae are subdivided into the chlorophytes and the charophytes.
Explanation:
How are the nucleotides in dna different from those found in rna?.
This type of receptor, once bound by ligand, can change conformation to allow specific substances to flow down their concentration gradient. This type of receptor is referred to as ____________ . This type of receptor is not an enzyme itself, but is bound to a protein that can exchange GDP for GTP and then stimulate effector proteins, which are usually enzymes. This type of receptor is referred to as ____________ . This type of receptor is a transmembrane receptor. It has an extracellular domain that binds to ligand, and an intracellular domain that can directly phosphorylate other proteins. This is an example of ____________ . This type of receptor binds to hydrophobic ligands. This type of receptor is referred to as ____________ .
Answer:
Channel linked receptor
Coupled receptor
An enzymatic receptor
An intracellular receptor
Explanation:
Quizlet
What does the information in DNA molecules provide instructions for?
a. Assembling amino acids into protein molecules
b. Assembling protein molecules into amino acids
c. Rearranging genes into protein molecules
d. Rearranging genes into traits
Answer: (B)
Explanation: DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.
etermine the amount of rock left for the following isotopes:
a) Carbon-14 has a half life of 5,730 years. A fossil sample taken from the Earth shows that
a sample that started with 850 g of C-14 now has 53.125 g. How old must this organism
be?
11. Make a checklist for
a client to use to
determine normal and
abnormal behaviors of a
pet. Include & label
behaviors that require an
owner to seek veterinary
attention.
Veterinarians have a great opportunity to save pets’
lives by recognizing that behavioral medicine is as
important as any other field of veterinary medicine,
and can routinely be incorporated into each veterinary
visit. Because most veterinarians never received education in veterinary school about feline behavior, and do
not have the time and resources to study all the latest
research and develop behavior protocols, the panelists
have worked to develop a concise, updated and “user
friendly” document that can be easily implemented.
The guidelines include the following information:
• Emphasis is on prevention, from pre-adoption or the
first veterinary visit, through senior life. Preventing
behavior problems should be an important part of total
wellness care. A list of behavior questions intended for
inclusion in the medical history questions used at each
appointment is provided to aid in early detection and
intervention of behavior problems.
• An outline is provided for guidance regarding how to
create realistic expectations about living with a cat. This
will encourage cat owners to provide positive outlets to
allow normal behavior, but in ways that clients will consider acceptable.
• Several of the appendices can be used for both prevention and treatment and can be made into client
handouts; these will delegate client education to the
veterinary support team and be used to facilitate the
veterinarian’s role in client education.
• A developmental table specifying home and veterinary
care needed at different stages of life is included. This
can serve as an excellent poster or client information
handout to help clients understand their responsibilities for home and veterinary care.
• Detailed information on behavior and environmental
enrichment is included to help prevent many of the
most common behavior problems.
• Suggestions regarding prevention and treatment of
obesity, the most common consequence of domestication of cats, are provided.
• To help veterinarians better handle routine behavior
concerns (eg, inappropriate elimination) a rational first
approach to the problems seen day-to-day is included.
• Behavior counseling and treatment, including behavior
modification and environmental enrichment, are discussed in detail. For cats needing medical treatment,
important drug information including dosing and
tapering of medication is provided. Information on
where to refer if needed is also provided.
• Information is provided that will promote comprehensive, state-of-the-art, holistic care that incorporates
both the physical and psychological well-being of our
feline patients.
• These guidelines will help veterinarians raise client
awareness that they should turn to the veterinary profession for advice regarding behavior, just as they do
with any medical concerns.
Summarize the steps of glycolysis using the key terms ATP, ADP, NAD+, NADH, glucose, and pyruvate.
Explanation:
LOOK AT THE FLOW CHART
IT MIGHT HELP U OUT
In this question we summarize the steps of glycolysis which is a process that occurs through a series of 10 reactions divided into two steps using the key terms ATP, ADP, NAD+, NADH, glucose and pyruvate.
Steps of glycolysis1st stage
This step, also known as the preparatory phase or investment phase, consists of five reactions:
1. Phosphorylation of the glucose molecule occurs, in which it receives phosphate from the ATP molecule, forming glucose 6-phosphate;
2. The glucose 6-phosphate molecule undergoes a rearrangement and forms fructose 6-phosphate;
3. Another ATP molecule supplies phosphate to the fructose 6-phosphate molecule, giving rise to fructose 1,6-diphosphate;
4. The fructose 1, 6-diphosphate molecule undergoes a rearrangement, with the opening of its benzene ring, giving rise to two molecules with three carbons each: glyceraldehyde 3-phosphate and dihydroaxethone phosphate;
5. The dihydroaxethone molecule undergoes a rearrangement giving rise to another glyceraldehyde 3-phosphate molecule.
It can be seen that at the end of this first phase, there was only energy expenditure, with the conversion of two ATP molecules into ADP.
→ 2nd stage
This stage, also known as the profit or energy compensation stage, involves energy gain and also consists of five stages, described below:
6. Two molecules of NAD+ (nicotinamide dinucleotide and adenine) are reduced to two molecules of NADH with electrons from the oxidation of glyceraldehyde 3-phosphate to 1,3-diphosphoglycerate;
7. Each molecule of 1,3 – diphosphoglycerate yields a phosphate to one molecule of ADP, thus giving rise to two molecules of ATP and two molecules of 3 – phosphoglycerate;
8. A rearrangement of 3 – phosphoglycerate molecules occurs, forming 2 – phosphoglycerate;
9. The 2 – phosphoglycerate molecules lose a H2O molecule, giving rise to phosphoenolpyruvate;
10. Phosphoenolpyruvate molecules provide a phosphate to an ADP molecule, yielding two ATP and two pyruvate molecules.
With this information, we summarize the steps of glycolysis which is a process that occurs through a series of 10 reactions divided into two steps using the key terms ATP, ADP, NAD+, NADH, glucose and pyruvate.
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What is the genetic code of life
Which types of dietary fats can increase blood ldl concentrations ?.
Answer:
saturated and trans fat can increase blood concentration
Provide examples of biotic and abiotic factors that affect an organism's range.
Answer:
water air soil sunlight and minerals
Explanation:
The biodiversity and distribution of organisms within an ecosystem is due to both abiotic (non-living) and biotic (living) factors.
Information from the taste buds travels to an area of the.
Information from the taste buds travels to an area of the frontal and temporal lobes of the brain.
What are taste buds?Taste buds are present in the tongue. They are responsible for the taste of whatever we eat. Taste buds are of different types. Like bitter, sweet, salt, and sour. They are different taste buds and are present in the different regions of the tongue.
The frontal and temporal lobe of the brain is responsible for the taste of food and other things. The frontal lobe is present in the frontal part of the brain, and the temporal lobe is on the side of the brain above the ears.
Different lobes of the brain are responsible for different works of the body.
Therefore, the frontal and temporal lobes of the brain get information from the tongue.
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What do the polar bears, reindeer, and shrubs that live in a single area make up? organism population community ecosystem.
Answer:
Ecosystem
Explanation:
It would be a ecosystem because the animals live together to make a liveable enviornment like a food chain. And all the organisms can sustain itself.
Answer:
ecosystem
Explanation:
POSSIBLE POINTS: 2
The image shows a nucleotide, a building block of the DNA molecule. Label the components of a nucleotide
The testes and ovaries both release the hormone testosterone. Please select the best answer from the choices provided T F.
Testosterone is a hormone that regulates puberty, function and the development of the male and female organs. The testes and ovaries both release the hormone testosterone.
What is the role of testosterone?In males, the Leydig cells of the testis and in females, the ovaries produces and releases the hormone testosterone. Also, some amount of the hormone is released by the adrenal gland.
It is major reproductive growth, functioning and stimulating hormone that is also responsible for the physical development of the organism during puberty.
Males have high levels of this hormone as females as they are essential for sperm development and some male physical characteristics.
Therefore, the statement is true.
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Explain how mountain ranges might be affected by Deposition.
SCIENCE
Answer:
It effects it because there's a possibility it can reduce the mountains to a smaller structure (breaking down), like a plateau, which would for sure leave a change in the landforms
Explanation:
~Cornasha_Weeb
Question 35
1 pts
s
What is the main difference between natural selection and
selective breeding? in selective breeding
humans allow nature to control the reproduction of species
humans choose plants or animals for reproduction
the strongest will survive and have more offspring
the organisms with the most genetic variation will reproduce
Answer:
humans choose plants or animals for reproduction
Explanation:
This can be seen in the farming industry with livestock and crops alike. Crops are usually chosen for a genetic resilience (like to arid, dry areas) and are reproduced with intervention from humans. This doesn't happen in the wild, therefore it is natural vs the unnatural and purposeful human intervention.
When animal cells are grown in a petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. This arrest of division is an example of.
Answer:
hope it helps
Explanation:
density dependent inhibition
Mangrove pneumatophore roots _______. A. Prop the trees up above the water line b. Excrete excess salt c. Absorb carbon dioxide from the air d. None of the above Please select the best answer from the choices provided A B C D.
Mangrove pneumatophore roots absorb carbon dioxide from the air.
WHAT ARE PNEUMATOPHORES?Pneumatophores, also called breathing roots, are types of roots possessed by mangrove plants.
Mangrove plants are adapted to swampy conditions, hence, must possess adaptational features that ensures their survival.
Pneumatophores help the mangrove plants to exchange gases like carbon dioxide and oxygen in the atmosphere.
Therefore, mangrove pneumatophore roots absorb carbon dioxide from the air.
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Answer:
Its B
Explanation:
Just took test any nobody on here is right so i picked d and that not it so its b
What are some characteristics of flowers that could attract the animals
that pollinate them?
Answer:
Many flowers use visual cues to attract pollinators: showy petals and sepals, nectar guides, shape, size, and colour. I personally think it is very cool how they know what to do to attract pollinators.
Explanation:
brainliest plz?
Which spheres attract each other with the least amount of gravitational force
Answer:
Mercury
Explanation:
Assuming that you are standing on the surface of the planet, Mercury, with a mass of 3.285 × 10^23 kg, has the lowest gravity. The radius of an object has no affect on the gravity.
Which protists can reproduce s3xually?
A. volvox and amoeba
B. euglena and amoeba
C. volvox and paramecium
D. euglena and paramecium
NEED THE ANSWER ASAP
Answer:
amoeba and eulgene is the answer