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s2008m [1.1K]
3 years ago
6

4. Oxygen molecules move across cell membranes through a process called

Biology
1 answer:
Ivanshal [37]3 years ago
8 0

Answer:

Diffusion

Explanation:

Oxygen molecules can travel through the phospholipid bilayer using diffusion. Diffusion is when molecules travel from a higher concentration to a lower concentration.

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A student has isolated a large compound (macromolecule) from cells. Chemical analysis of the compound shows that it is made up o
Kruka [31]

Answer:

To which group of macromolecules does this compound most likely belong? B) Protein

Explanation:

If the chemichal analysis of the compound showed carbon, hydrogen, oxygen, nitrogen and phosphorus, we would we talking about nucleic acid. Lipids would not be a possibility because they are made of hydrocarbons. When it comes to carbohydrates, they are made of carbon, hydrogen and oxygen. Protein is the right answer because they are made of carbon, hydrogen, oxygen, nitrogen, and sulfur.

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4 years ago
___________ lyse infected host cells. *
Alex73 [517]

Answer:

Adaptive immunity also involves a memory to provide the host with long-term ... Unlike NK cells of the innate immune system, B cells (B lymphocytes) are a ... Cytotoxic T cells destroy virus-infected cells in the cell-mediated immune ... Helper T- cells are one of the main lymphocytes that respond to antigen-presenting cells.

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3 years ago
The cell is like a city. The many different parts (organelles) of a cell work together for the functioning of the whole cell. Ex
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Answer:

=)

Explanation:

A cell is very much like a city and one example is like how cytoplasms are like factories because they break down and absorb energy and they hold the organelle

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3 years ago
What constant variable are needed to grow a plant?
ahrayia [7]
Each plant needs to be exposed to an equal amount of sunlight, so sunlight is the control variable
3 0
4 years ago
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The nitrogenous products of the breakdown of proteins are excreted as ammonia, urea and uric acid. Explain the difference in eac
rosijanka [135]

Answer:

The protein that are intake through foods are broken down in the body and is converted into nitrogenous waste products which are eliminated from the body through the process of  excretion.

Explanation:

Ammonotelic-Those organisms that excrete nitrogenous waste products in the form of ammonia from the body throuh the process of excretion is called as ammonotelic animals.Ammonia is more soluble in water.

Ex- Bony fish, Octopus, Sepia etc.

Ureotelic-Those organisms that excrete nitrogenous waste products in the form of Urea from the body through the process of excretion is called as Ureotelic organisms.Urea is soluble in water.

Ex- Human.

Uricotelic-Those organisms that excrete nitrogenous waste products in the form of Uric acid from the body through the process of excretion is called as uricotelic organisms.Uric acid is insoluble in water.

Ex- Reptiles, birds etc.

8 0
3 years ago
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