Answer: B cells produce and secrete antibodies, activating the immune system to destroy the pathogens. The main difference between T cells and B cells is that T cells can only recognize viral antigens outside the infected cells whereas B cells can recognize the surface antigens of bacteria and viruses.
Explanation:
Which of the following best describes conditions that scientists hypothesize to have existed on early Earth?
Extremely cold temperature
Lack of water vapor in the atmosphere
Presence of self-replicating molecules
Very low levels of free oxygen
Answer:
presence of self replicating molecules
Which 2 disorders are the most similar? Hemophilia, Beta Thalassemia, Sickle Cell Disease. Explain.
Answer:
Sickle Cell and Thalassemia are similar because they are both genetic disorders and are both caused by errors in the genes for hemoglobin, a substance composed of a protein
Explanation:
All organisms and the natural cycles of the earth operate:
one at a time
together
by themselves
without help
Answer:
Together
Explanation:
All of the organisms need each other to survive, all of the natural cycles are necessary to keep the Earth in balance.
Someone help me please thank you lol!
Humans, like other organisms, require energy for growth and repair. When cells create ATP for energy, carbon dioxide is produced as a waste product. How does the body respond to this process in order to maintain homeostasis?
Answer:
The circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.
Explanation:
Carbon dioxide produced by the cells and tissues during cellular respiration is removed from the body through the interaction of the circulatory and respiratory system. The medium of transport of carbon dioxide is the blood which carries to the lungs, where it is expelled from the body in ordernto maintain homeostasis in the body.
Carbon dioxide molecules are transported in the blood from body tissues to the lungs in three ways:
1. Dissolution directly into the blood - due to its greater solubility in blood than oxygen, carbon dioxide is dissolved in blood plasma. On reaching the lungs, it leaves the blood by diffusion and is then expelled out of the body.
2. Binding to hemoglobin - carbon dioxide binds reversibly with haemoglobin in the red blood cells to form a molecule called carbaminohemoglobin. When it reaches the lungs, the carbon dioxide freely dissociate from the hemoglobin and is expelled from the body.
3. Carried as a bicarbonate ion - the majority of carbon dioxide molecules are carried as part of the bicarbonate buffer system. In this system, carbon dioxide diffuses into the red blood cells. The enzyme carbonic anhydrase within the red blood cells quickly converts the carbon dioxide into carbonic acid (H2CO3) which then dissociates into bicarbonate and hydrogen ions. The bicarbonate ions leaves the red blood cells in exchange for chloride ions in the plasma. The bicarbonate ions then travel in plasma to the lungs, where they enter the red blood cells again. It combines with hydrogen ions from the haemoglobin to form carbonic acid. Carbonic anhydrase breaks carbonic acid down into water and carbon dioxide which is then expelled from the lungs.
How does abiotic and biotic factors influence an ecosystem?
Answer:
Los factores abióticos pueden definirse cuáles son los componentes físicos y químicos no vivos en el ecosistema. Mientras que los factores bióticos son los componentes vivos de un ecosistema. Tanto los factores bióticos como los abióticos influyen en la supervivencia y la reproducción
Parenchyma is a simple permanent tissue and xylem is a complex
permanent tissue.
Answer:
Explanation:
This is parenchyma is found below the epidermis of plants and It of living cells that have thin cell walls which are loosely packed to accommodate the intracellular space. Parenchyma consist of chlorophyll and they take part in photosynthesis.
Xylem is called a permanent tissue because it contain various types of cells like tracheids, vessels, xylem fibres, xylem parenchyma which is responsible for storing food.
Which type of mutation occurs only in gametes?
Answer:
germ line mutation
Answer:
Germline Mutations
Explanation:
Germline mutations – occur in gametes and can be passed onto offspring (every cell in the entire organism will be affected)
What type of molecule is produced by the ribosome?
A. DNA
B. RNA
C. protein
D. all listed
Answer:
The correct answer is - C. protein.
Explanation:
Ribosomes are biological molecules that are made up of RNA and proteins. These molecules produce protein molecules with the help of mRNA by the process of translation. These molecules are called the factory of protein or protein synthesis site.
The RNA that is present in these molecules is ribosomal RNA. These are attached to the other cell organelles called endoplasmic reticulum used the protein to check and modify them.
Help please!! I'll name you brainliest!!
Answer:
Aerosols they leave freely through the ozone
please help thanks!!!!
Answer:
I believe that the smallest is Nucleotide, bases, genes, DNA, Chromsomes.
Explanation:
Which type of food products store best in the freezer?
A. Low Water Content Foods
B. Average Water Content Foods
C. High Water Content Foods
Select the correct answer.
The Punnett square for a sex-linked trait is shown. The recessive trait is carried only by the X chromosome. Xr is the recessive allele. Based on the Punnett square, which statement is true?
Xr X
X XrX XX
Y XrY XY
A.
Female offspring have a 50 percent chance of expressing the recessive trait.
B.
Both male offspring will express the recessive trait.
C.
Both female offspring will express the recessive trait.
D.
There’s a 50 percent chance the male offspring will express the recessive trait.
Answer:
D. There's a 50% chance the male will express the recessive trait
Explanation:
Because X is dominant over Xr, a female could not express it in this punnett square because she will have the extra X chromosome. While males do not have the extra X so if they receive the Xr they will have nothing to "cover" them.
Answer:
d i just took the test
Explanation:
What will happen if both the biceps and triceps muscles contract at the same time?
Answer:
the biceps and triceps muscles work together to allow you to bend and straighten your elbow. When you want to bend your elbow, your biceps muscle contracts, and, at the same time, the triceps muscle relaxes.
Explanation:
What type of weather does a H pressure system bring to an area? *
O wet and cloudy
O Dry and cloudy
O clear skies and sunny
O Hot and Sunny
✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧
✅ Clear skies and Sunny.Explanation: ❗ Cold air is denser and thicker than warm air, so it usually sinks as warm air increases. Cold air sinks which causes a transient accumulation of water near the earth's area and thus an area with a high pressure in regions where winds meet at high altitude. With an increase in altitude air pressure reduces, so high pressure is in fact a relative concept. Weather forecasters commonly use this to signify high pressure relative to normal atmospheric pressures at that level.
~ ₕₒₚₑ ₜₕᵢₛ ₕₑₗₚₛ! :₎ ♡
~
Write a paragraph to explain how Motown Records became a hit with music fans in the 1960s. Use examples from the Article to support your ideas.
Answer:
60s Motown: When An Independent Detroit Record Label Ruled The World ... Across the Atlantic in Europe, influential bands became fans of soul and R&B, ... Gordy had written hits for Jackie Wilson in the 50s and knew something about what Motown songs reflected the agonies of the mind and soul before this became popular Explanation:
What is meant by "between
organisms"?
A. The distance between organisms
B. The distance between environments
C. The interaction between organisms
D. The interaction between ecology and biology
Answer:
C. The interaction between organisms
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Biogeochemical cycles in ecosystems PROJECT: modeling the carbon cycle
What decreases in the water when algae grow quickly?
Answer:
Fish and other insects
Explanation:
Hope that helps
What is the answer to this question
Answer:
Tertiary Consumer
Explanation:
The snake is high on the food chain but it still gets eaten by bird (I can't see the name).
How does blood travel from your heart to your limbs, such as your arms and legs?
A
through veins
B
through capillaries
C
through arteries
D
through carbon dioxide
Answer:
A
Explanation:
I'm not completley sure but veins go to every location in your body while capillaries and arteries are in designated areas.
Answer:
c
Explanation:
a.) Give one example of how animals respond to their environment
b.) Give one example of how plants respond to their environment
Answer:
1. Animals may to environmental stimuli through behaviors that include hibernation, migration, defense, and courtship. As a result of cold, winter weather some animals will hibernate. Examples of hibernating animals maybe ants, snakes, black bears, beavers, and ground squirrels.
2. Plants grow towards the light. Plant leaves bud and seeds germinate when the temperature is right. Their roots and stems grow in certain directions in response to the pull of gravity.
Explanation:
Answer:
a) For example, a cat may see a saucer of milk. Information from
the cat’s eyes travels along nerve cells to the brain, where the brain
processes the information. If the brain decides it wants the milk,
the brain sends a signal to the muscles in the cat’s limbs, and the cat
moves to the saucer of milk and drinks it
Explanation:
b) For example,
specialized cells in the leaves of trees detect the decrease in sunlight
as winter approaches. Chloroplasts then reduce production of green
chlorophyll. As existing chlorophyll is broken down, other coloured
particles are revealed, creating the beautiful red- and orange-coloured
leaves we see during autumn. Th e leaves eventually die and fall off . In
the spring, increased sunlight and warmer temperatures promote the
production of new leaves containing large amounts of chlorophyll, and
the green colour returns to the leaves.
What is required for sympathetic speciation to occur?
A. Continuous gene flow populations'
B. Geographic separation of a population
C. Emergence of a reproductive barrier
D. A limited separation of members of a population, followed by reintroduction back into the parent population
Answer:
I'm no biology teacher but I think its C im in 8th grade and did this last year i believe(:
Explanation:
Hope this helps you out!
Can anyone tell me how old this bird is. We found it outside.
10. Why are most species that have ever lived on Earth extinct?
Explanation:
At least 571 species have been lost since 1750, but likely many more. The main cause of the extinctions is the destruction of natural habitats by human activities, such as cutting down forests and converting land into fields for farming.
Answer:
Some animals have gone extinct due to over hunting on them for skin, while some have died of because they weren't able to adapt to their environment because it change over time, causing them to go extinct
Explanation:
1.2 DESIGN CONSIDERATION
Answer the following questions:
1.2.1 What problem did the paramedics encounter at the accident scene?
Answer: Paramedics are the medical professionals which perform multitasking in providing medical aid to the patients in the field as well as in the hospital.
Explanation:
Problems encountered by the paramedic at the accidental scene:
1. Major problem is the collection of the blood and other bodily fluids for examination as it is contaminated over spilling on the road.
2. Stabilizing and uplifting of the patient found on accident and curating them to ambulance is a labor consuming task.
3. Some body parts are severely damaged in accidents some of which includes those parts which covers the vital organs like ribs, spinal cord, skull, and pelvis so stabilizing those parts is a risky task for paramedics and can even kill the patient.
Answer both questions.. would be greatly appreciated.
Which of the following situations would be followed by primary succession? (choose all that apply):
a) earthquake
b) severe landslides
c) lava flows
d) overgrazing
Which of the following would be followed by secondary succession? (choose all that apply):
a) earthquake
b) lava flows
c) overgrazing
d) tornado
Answer: the first one is overgrazing and severe landslides
Explanation:
Answer:
Which of the following situations would be followed by primary succession? (choose all that apply):
LAVA FLOWS
Explanation:
Amoeba and algae are examples. Sometimes they are called the odds and ends kingdom because its members are so different from one another. Some "act" like plants; others like animals. They are eukaryotic, unicellular & some have whip-like appendages for movement. Prakanote
Answer: Protists
Explanation:
The protists are organisms which have characteristics similar to both plants and animals. There is huge diversity of protists on earth as they are single celled organisms and they increase in numbers by reproduction. They have a specialized cellular structure which includes organelles like nucleus, mitochondria, and others which are characteristic features of the eukaryotic organisms. They live in moist environment. They engulf their prey this way they are heterotrophic and they can also photosynthesize like plants.
what do eukaryotes have that prokaryotes lack?
a) cell walls
b) nuclei
c) chroloplasts
d) ribosomes
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b) nuclei
thanks hope it helps3. What tools would you use to determine if a cell is from a plant or from an animal? Explain,
Answer:
Dont know
Explanation:
Lol
