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3 years ago

Cells have particular structures that perform specific jobs. These structures are known as _______.

1 answer:

7 0

<span>The answer is organelles a specialized part of a cell having some specific function. Organelles is a cell organ specialized part of a cell having some specific function; a cell organ. Also it is a structure or part that is enclosed within its own membrane inside a cell and has a particular function.</span>

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1. A plant tissue cells are elongated and thickened with cellulose strips at the corners.

Aleksandr [31]

Answer:

Explanation:

Collenchyma is the tissue with cellulose strips at the corner. It is usually found in the shoots and leaves of plants providing strength, support. The cells have thick cell walls with the corners thickened with cellulose.

Collenchyma is made of up cellulose and pectin, starch are stored as cellulose in collenchyma.

It prevents breakage of young stem by given strength, especially in growing shoots and leaves due to its thickened corners.

7 0

3 years ago

How does carbon dioxide concentration affect photosynthesis rate?

DiKsa [7]

Increasing the concentration of carbon dioxide increases the rate of photosynthesis, as there is a greater supply of it that can be used. Of course, you can only add so much carbon dioxide before the plant can’t perform photosynthesis at an any faster rate. Increased carbon dioxide concentration will increase the rate of photosynthesis until it is no longer the limiting factor in the reaction.

7 0

3 years ago

Read 2 more answers

What type of energy makes heat

taurus [48]

C. kinetic energy

On a microscopic scale, conduction occurs as rapidly moving or vibrating atoms and molecules interact with neighboring particles, transferring some of their kinetic energy.

5 0

3 years ago

Read 2 more answers

Almost 50 percent of water withdrawn in the US, is used up by thermoelectric power plants. The table below shows the amount of w

sp2606 [1]

Answer:

The number of thermal power plants increased between 1950 and 1975.

Explanation:

Here, the table that shows the amount of water withdrawn in billion gallons per year, between 1950 and 2005,

Year 1950 1965 1975 1990 2005

Amount 180 340 420 410 410

Since, 420 > 180,

Also, 50 percent of water withdrawn is used up by thermometric power plants.

Thus, thermal power plants in 1975 > thermal power plant in 1950

Therefore, the number of thermal power plants increased between 1950 and 1975.

Second option is correct.

Note : first option is incorrect.

Since, by the above table,

The least amount of water used by power plant is 180 billion gallons per year,

Thus, third option is incorrect,

Now, the table does not represents energy produced,

Fourth option can not be said correct.

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4 years ago

Which of the following statements is true of cyclin-dependent kinases? O O O O O They regulate the cell cycle by phosphorylating

jekas [21]

Answer:

They regulate the cell cycle by phosphorylating other proteins

Explanation:

they are serine-threonine kinases, they play an important role in the phosphorylation of other proteins. Cyclin-CDK complexes phosphorylate substrates appropriate for a particular cell cycle phase and without that, the cycle cannot continue.

6 0

3 years ago