What are the pores in a leaf called and what is their purpose

2 answers:

8 0

Answer: Helps the plant breathe: The epidermis of the leaf contains guard cells that control and regulate the small pores on the undersurface of the leaves. These pores are called stomata. Stomata are responsible for regulating water in and out of the cell. It is also responsible for the exchange of gases across the epidermis.

zavuch27 [327]2 years ago

8 0

Leaf surfaces are dotted with pores called stomata, and in most plants they are more numerous on the undersides of the foliage. The stomata are bordered by guard cells and their stomatal accessory cells (together known as stomatal complex) that open and close the pore.

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A circular molecule of DNA contains 1 million base pairs. If the DNA synthesis at a replication fork occurs at a rate of 100,000

lakkis [162]

Answer:

<h2>5 minutes </h2>

Explanation:

1. In bidirectional replication; there are two replication forks, and each proceeding at a rate of 100,000 (as given in the question) nucleotides per minute.

2. So, by the given rate of replication, we can calculate that, it would require 5 minutes for the circular DNA molecule to be replicated by bidirectional replication because each fork synthesize 500,000 nucleotides in 5 minutes ( 100,000 per minute) ( as given, in 5 minutes × 100,000 nucleotides per minute= 500,000 and by 2 forks= 1,000,000) within the time period.

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3 years ago

_____ is a public relations strategy that involves getting a product, service, or company name to appear in a movie, television

atroni [7]

Answer:

product placement

Explanation:

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3 years ago

If one were to cut the plasmid DNA with Hindill, Apal, and Smal, how large is each

tiny-mole [99]

A linear shaped piece of DNA strand is obtained when a plasmid is cut HindIII, Apa1, and Sma1.

Explanation:

Restriction enzymes are endonucleases which enzymatic proteins which can cut a DNA at specific sequences at particular recognition sites. The sequences recognized by these enzymes are usually palindromic that occurs for a definite length (6 bp, 4 bp, or 8 bp).

They can either be blunt cutters or sticky end cutters. APA1, SMA1, and HindIII are all restriction enzymes which can cut a circular plasmid at specific locations.

These restriction enzymes bind with the DNA at specific locations and cuts them to give linear strands of DNA either with a blunt or a sticky end.

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3 years ago

Which statement best explains why the development of a new area of science can lead to changes in a theory? A.A new area of scie

Levart [38]

Hey there!

It is mostly like "B". A new area of science promotes experimentation from a different point of view because everything else is explains why the development of the new area of science which could lead to change in a particular theory but they aren't quite the "best" one

SO, that is why $\boxed {Option B}$ is mostly likely your result