<span>Stamen produces pollen so the best answer is stamen.
I hope it helped :)</span>
Answer:
10
Explanation:
Proteins are polymers of amino acids. 20 different amino acids are present in various combinations in different proteins. Humans are incapable of synthesizing some amino acids. These are called the essential amino acids as they must be provided in the diet.
Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are the nine amino acids that are not synthesized in the body of adult humans and therefore, are categorized as essential ones. Arginine is a non-essential amino acid for adult humans but is essential for adult humans. Therefore, for an infant, more than 9 amino acids are essential ones.
Considering the following;
I. Heat is not readily available to all living cells.
II. Heat at excessive amounts denatures proteins.
III. Heat does not provide the activation energy for their reactions.
IV. When a critical temperature is reached, proteins no longer function
Answer;
I and IV
Explanation;
Living cells cannot use heat to provide the activation energy for biochemical reactions because heat is not readily available to all living cells and also when a critical temperature is reached, proteins no longer function.
Too much heat can kill an organism by rendering its organelles, cells, tissues and organs permanently inoperable and un-salvageable. The same process can be observed in tissues at low temperatures, and is the cause of frostbite. This is because enzymes are denatured by high temperature and inactivated by low.
<h3><u>Answer;</u></h3>
A) Some protists evolved into other eukaryotic groups.
<h3><u>Explanation</u>;</h3>
- Protists are eukaryotes , making them much more complex than the prokaryotes, such as bacteria.
- Protists may be classified as a paraphyletic group, since they are difficult to group under a single ancestor because of their diversity and dissimilarity from each other.
- Protists evolved from prokaryotes, eventually giving rise to the entire line of eukaryotes that exists today.
