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nasty-shy [4]
2 years ago
7

In three (3) sentences, explain the function of a vacuole in plant cells

Biology
2 answers:
Evgesh-ka [11]2 years ago
7 0
Vacuole is needed in plant cells to store water, food and nutrients. It also does the job of getting rid of waste in the cell. Another function of vacuole is to provide structural support and protection of the plant cell.
Ede4ka [16]2 years ago
6 0
It is often the largest organelle in the cell and is surrounded by a membrane. It functions to hold materials and wastes. It also functions to maintain the proper structure within the plant cells to provide structure and support for the growing plant. 

I hope this helps, I apologize if it's incorrect.
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What is meant by the following statement? The cell membrane is semipermeable. A. The membrane allows all polar molecules into th
Gennadij [26K]

I believe the correct answer would be B.  Semipermeable means that it allows certain substances to pass through, and certain other ones to not pass through.  So given all of your options, I would say that B makes the most sense.  Hope this helped!

-TTL

7 0
2 years ago
Which of the following best explains the flow of energy in this food web?
Gnoma [55]

Answer:

Plants → Grasshopper → Snake → Mushrooms

Explanation:

Read it from the sun, then it points to the grass, then grasshopper, then snake, then mushroom.

3 0
2 years ago
What are the steps of DNA Replication in order?
slega [8]

Explanation:

1) The enzyme helicase catalyses the unwinding of the two DNA strands by disrupting the hydrogen bonds between complementary base pairs.

2) Single-stranded binding proteins attach to the DNA strands to stabilise them and prevent them from joining back together.

3) The enzyme primase catalyses the addition of a short primer consisting of RNA nulceotides to the DNA strand. This serves as an 'anchor' DNA polymerase to initiate replication.

4) The enzyme DNA polymerase synthesizes a new DNA strand by incorporating DNA nucleotides complementary to the existing strand. DNA polymerase activity only occurs in the 5' ---> 3' direction.

5) The enzyme ligase catalyses the formation of hydrogen bonds between the two new pairs of DNA strands, and seals any breakages in the sugar-phosphate backbone.

6 0
3 years ago
Which is a difference between proteins and carbohydrates and fats?
morpeh [17]

Answer:

HERE JUST TAKE IT

Explanation:

Ok, there's carbon and hydrogen in all of them, that's the only similarity. They are known collectively as macro-nutrients.

Carbohydrates are basically, oxygen, carbon and hydrogen and they're the bodies primary source of energy. This means that they're the first source of energy used which is why if you eat foods high in simple sugars you get a sugar rush. All carbs metabolize down to glucose, some faster than others.

Fats are called lipids. Lipids are very heterogeneous (this means that there's not much similarity between them). Some examples of lipids are steroids, seed oils, pork fat, cholesterol, etc. The main thing in common with them is that they don't mix with water. They are readily stored in fat cells in the form of tryglicerides and are used when carbs are all used up. They also yield the highest per gram amount of energy (it escapes me right now).

In a chemical sense, fats are lipids derived from animals (saturated, solid at room temperature) and oils are derived from plants and seeds (insaturated with some exceptions, and liquid at room temperature. Insaturated are healthier because they contain HDL which cleans your arteries (prevents artherosclerosis).

Proteins are made up of aminoacids, 20 make up the vast amount of human proteins. Enzimes (the most famous being digestive enzimes) are proteins, skin is covered in protein, hair is protein, cilia and flagella are protein, basically EVERYTHING is protein, after water the human body is basically protein. They're only used up as energy when everything else is used up.

When athletes eat/drink protein, it's to give them building materials in order to increase the amount of stuff inside their cells which will enable them to produce more energy.

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2 years ago
11. what are threats to biodiversity? (at least three examples)
Elena L [17]
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