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Artist 52 [7]
3 years ago
5

Why do you think leaves have stomata on their underside only? Explain.

Biology
1 answer:
Alexandra [31]3 years ago
7 0
The stomata must be open during the daylight hours to let oxygen and carbon dioxide pass through. While they are open, water vapor escapes into the atmosphere (transpiration). ... Transpiration is the loss of water through stomata, so, more stomata are found on the lower surface to prevent excessive loss of water.

In a lotus plant, stomata is found on the upper epidermis of the leaf.

Stomata are responsible for the exchange of gas with the surrounding atmosphere of the leaf. Their guard cells stay taut during the day to keep the stoma open.

Guard cells can only stay open if they are saturated with a certain quantity of water.

From this information we can infer that stomata are typically found on the lower epidermis to prevent water damage when it rains.

The rain would not only cover the openings, it would also ruin the osmotic balance of the guard cells causing inefficiency and damage to the cycle of gaseous exchange.

Natural selection probably selected against such plants giving rise to those with stomata on the underside.
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Which evidence supports viruses being classified as living things?
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Answer:

They are made up of protein.

Explanation:

Through out the cells life they all need protein to keep function.

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These elements are located to the right of the dividing line. Nitrogen (N), oxygen (O), fluorine (F), chlorine (CI), and the nob
DerKrebs [107]

Yo sup??

the answer is option D ie

non metals

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Hope this helps

5 0
3 years ago
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Why don't substitutions cause a change in the amino acid sequence of a protein
shusha [124]

Answer:

<h2>DNA is constantly changing through the process of Mutation...</h2>
4 0
3 years ago
Most nonsense mutations in genes that encode structural proteins cause a null ("knockout") phenotype.
cestrela7 [59]
  1. TGA (opal)

Answer:

Explained below

Explanation:

A mutation in a gene that results in total loss of the normal function of the gene product encoded by that gene, resulting in a Null phenotype.

Changes in DNA sequence are termed as nonsense mutation that introduce a stop codon, resulting in a non functional protein. This terminology results stop codons have also worked as nonsense codons.

There are three different stop codon-

In RNA

  1. UAG (amber)
  2. UAA (ochre)
  3. UGA (opal)

In DNA

  1. TAG (amber)
  2. TAA (ochre)
  3. TGA (opal)
4 0
3 years ago
Which of the following changes would most likely reduce the rate at which a resource is consumed?
Lyrx [107]

Decreased population will decrease the rate at which resource is consumed.

Option C.

<h3><u>Explanation:</u></h3>

Rate of resource utilization depends on the demand for resources among a population. The demand increases with the increase in population who actually uses the resource to increase their comfort.

With the increase in population and increased desire for resources, the rate of consumption of resources is increased. Decreased cost of harvesting the resources will led to wastage of resources, which will again increase the demand again.

So, decrease in population will only decrease the demand for resources. This will actually decrease the rate for the resource harvesting.

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3 years ago
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