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Slav-nsk [51]
3 years ago
11

which of the following is the only evolutionary force that can create brand-new genetic variation within a population? a. mitosi

s b. recombination c. mutation d. natural selection
Biology
1 answer:
vichka [17]3 years ago
6 0
C. <span>mutation................</span>
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Describe two factors that are responsible for regulating the cell cycle. What is their role in the regulation process?
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Answer:

The cell cycle is controlled by many cell cycle control factors, namely cyclins, cyclin-dependent kinases (Cdks) and cyclin-dependent kinase inhibitors (CKIs). Cyclins and Cdks, which are positive regulators of the cell cycle, activate cell cycle factors that are essential for the start of the next cell cycle phase.

Explanation:

Listen to pronunciation. (sel-SY-kul REH-gyoo-LAY-shun) Any process that controls the series of events by which a cell goes through the cell cycle. During the cell cycle, a cell makes a copy of its DNA and other contents, and divides in two.

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A researcher investigates an organism found on the ocean floor. The organism is asymmetrical. It lacks a body cavity, body tissu
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The correct answer is option A, that is, Phylum Porifera.  

The species of Phylum Porifera are aquatic, that is, mostly marine. They exhibit cellular grade of the body, they are diploblastic animals with asymmetrical symmetry. They lack body cavity and exhibits a holozoic mode of nutrition with intracellular digestion.  

They lack circulatory and nervous system and possess the tendency to regenerate their parts of the body. The organisms in phylum Porifera exhibits both asexual and sexual mode of reproduction.  


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3 years ago
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Mayras maternal grandfather into maternal uncle died of heart attacks and her mother has high blood pressure. What answer best e
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Mayra should be checked regularly for heart-related problems.

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3 years ago
What are the functions of the three major forms of RNA (ribosomal RNA, messenger RNA, and transfer RNA)?
vovangra [49]

Answer:

Ribosomal RNA: Structural part of ribosomes

Messenger RNA: Carry genetic information from DNA to proteins

Transfer RNA (tRNA): Transport amino acids to protein synthesizing complex.

Explanation:

Ribosomes are made up of ribosomal RNA (rRNA) and proteins. The catalytic activity for the formation of peptide bonds between amino acids during protein synthesis resides the RNA of ribosomes.  

Messenger RNA (mRNA) is formed by the process of transcription during which the nucleotide sequence of the template DNA strand is copied into that of the RNA. The mRNA serves as a template for protein synthesis. The nucleotide sequence of mRNA is read in the form of genetic codes to specify the amino acid sequence of a protein. In this way, the genetic information stored in DNA is carried to the proteins.

During the process of protein synthesis, tRNAs carry amino acids to the mRNA-ribosome complex so that the amino acids are incorporated into the polypeptide. For the purpose, there is a tRNA with a specific anticodon sequence for a particular amino acid.  

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3 years ago
Question 5
kati45 [8]

The correct answer is False!

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3 years ago
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