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daser333 [38]
3 years ago
14

What are the projections used for in viruses?

Biology
1 answer:
Lana71 [14]3 years ago
8 0

Those are calles spikes that are made usually of glycproteins. Those glycoproteins attach to receptors in the cell membrane of the host cell to trick it into letting the virus in.

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What types of materials are expelled from cells during exocytosis?
alex41 [277]

Large molecules such as hormones materials are expelled from cells during exocytosis

<u>Explanation:</u>

The materials inside the cells are transferred to the outside of the cell and this manner is termed as  Exocytosis. This method is termed as a kind of active transport since it needs energy for this transformation process. One of the major purposes of this process is to discharge trash matters like hormones and proteins.

For a cell to cell transmission and chemical signal messaging these methods are essential. Proteins that are newly generated are transferred to the peak of the plasma membrane by exocytosis. There are three general pathways of exocytosis.

5 0
3 years ago
15
s344n2d4d5 [400]

OPTIONS:

a. When there are just two other people at the party.

b. When everyone is wearing a nametag.

c. When there are more than 50 people attending the same party.

d. When the need for help from the person who is having a heart attack is very clear

Answer:

c. When there are more than 50 people attending the same party.

Explanation:

Bystander effect is a term used in social psychology to describe the tendency of an individual to intervene in the event of an emergency to offer help to the person needing it, when others are present at the scene of the emergency.

In the case of an emergency just like the scenario stated in the question, where someone develops a heart attack at a dance party, if the party has more people, the slimmer the chance of the person getting help from any of the 50 people at the party, as the presence of others would tend to discourage the any individual from attempting to help the victim having the heart attack.

The situation that would more likely show the bystander intervention effect is <em>"c. When there are more than 50 people attending the same party."</em>

5 0
3 years ago
Water stores heat much longer than other substances do allowing organisms to
Wittaler [7]
Because water is so good at storing heat energy, it is harder for organisms to experience a change in body temperature in harsher climates.
3 0
3 years ago
Which level of life includes all of the other levels in this list: organisms, cells, biosphere, molecules, ecosystems?
Vladimir79 [104]

Answer:

Biosphere

Explanation:

The biosphere is the part of the earth that supports life forms. It includes hydrosphere, atmosphere, and lithosphere. Various ecosystems, aquatic or terrestrial, are present in the biosphere. Biotic and abiotic components of a geographical region that interact with each other together make an ecosystem.

The biotic component of an ecosystem includes all the organisms present in it. Organisms may be unicellular or multicellular. All the organisms are made up of one or more cells. Cells are made up of various biomolecules that interact and enable cells to perform the life processes.

5 0
3 years ago
What use one reason the air in cities is often polluted
lana66690 [7]

cars are generally older

7 0
3 years ago
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