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AlekseyPX
3 years ago
9

Natural selection does not always result in an increase in genetic diversity.

Biology
2 answers:
kozerog [31]3 years ago
7 0

The right answer is True.

If the selection is made on the phenotype, at the individual level, the understanding of the variation of the characters over time and thus of the evolutionary processes requires that one is interested on a larger scale: sets of individuals ( populations).

The genetic diversity resulting from mutations and rearrangements of the genome means that at a given moment, a natural population is not homogenous from a genetic point of view: there are for the most part genes and sequences several alleles, whose frequencies ( allelic frequencies) will vary over time (it could increase, and sometimes decreaqse geneic diversity between the individuals).

Neporo4naja [7]3 years ago
3 0
T it is not always diversity 
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Venoms and toxins are ____________ while others are components of ____________ or bacterial cell walls.
umka2103 [35]

Answer:

free molecules; plasma membrane

Explanation:

-Venom are complex mixtures of molecules called "toxins"

-Plasma membrane is the membrane found in cells that separates the interior of the cell from the outside environment

3 0
2 years ago
A client has been diagnosed with gram-negative pneumonia. Knowing this bacteria has a lipopolysaccharide endotoxin on the outer
agasfer [191]

Answer:

The options

A)Damage to cellular mitochondria

B)Increased ATP levels

C)Activation of the p53 protein

D)Apoptosis

The CORRECT ANSWER IS D

D)Apoptosis

Explanation:

The extrinsic pathway of apoptosis includes extracellular signaling proteins which adhere to cell surface molecules known aa death receptors which in turn activates apoptosis.

The aftermath activates endonucleases prompting division of DNA and ultimately cell death.

Apart from the TNF and Fas ligand, primary signaling molecules also promotes the extrinsic pathway, examples of such are the TNF-related apoptosis-inducing ligand (TRAIL); the cytokineinterleukin-1 (IL-1); and lipopolysaccharide (LPS), the endotoxin located in the outer cell membrane of gram-negative bacteria while the activation of the p53 protein, and decreased ATP levels in the intrinsic pathway results in DNA damage.

6 0
3 years ago
Which of the following statements are true. Chloroplasts are the sites for photosynthesis. Mitochondria specialize in oxidative
Leokris [45]

Answer:

  1. Chloroplasts are the sites for photosynthesis
  2. Mitochondria specialize in oxidative metabolism
  3. Ribosomes are involved in protein synthesis

6 0
3 years ago
An electrocardiogram (ECG) provides information about ________. A. the pressure of blood in the heart chambers B. the rhythm of
mario62 [17]

An electrocardiogram (ECG) provides information about B) the rhythm of heart contractions

The rhythm of heart contractions can be known by an electrocardiogram (ECG).

An ECG or Electrocardiogram is a method to diagnose the heart conditions to check the normal functioning of the heart.

The process to measure the electrical signals of the heart can be done by using this machine.

In this technique, three leads are attached to both the wrist and the left ankle to measure the electrical activity of Heart. The rhythm of the heart contraction and relaxation can be used to find out any heart abnormality.

It is used to investigate the heart problems associated due to bad health or some chronic inflammation affecting the functioning the body. Shortness of breath or nausea is investigated by using an ECG machine to help the patient and doctor to find out the cause.

It consists of QRS complex which measures the heart beat.

Learn more about Heart here, brainly.com/question/16566688

#SPJ4

3 0
2 years ago
PLEASE HELP
Doss [256]

Explanation:

I'm not an expert or sum, but with using logic I would choose: DNA plays a role in the growth and reproduction of organisms, DNA guides the formation of an organism's structures.

3 0
3 years ago
Read 2 more answers
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