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Whitepunk [10]
4 years ago
10

Which of the following statements is not consistent with the results obtained in Rutherford’s gold foil experiment?

Biology
2 answers:
OLEGan [10]4 years ago
8 0
D. Electrons are contained in the nucleus of an atom.
irina1246 [14]4 years ago
3 0
 <span>A. The nucleus of an atom is positively charged is not consistent with the results obtained in Rutherford?s gold foil experiment</span>
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Natural selection causes changes in populations of organisms, not individual organisms, because A. differential reproductive suc
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B. genetic variation imparting reproductive success.
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4 years ago
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Once pathogens have penetrated the non-specific barriers, they are confronted by macrophages and natural killer cells. how do th
laiz [17]

Answer:

             When a pathogens cross non-specific barriers (skin) they disturb the homeostasis of the body. however inside body they are confronted by different types of white blood cells which are responsible for bringing homeostasis again in the body. these are described below.

Role of macrophages in maintaining homeostasis

Macrophages are white blood cells (phagocytes) constantly patrolling in the body and destroy other cells by engulfing and ingesting them through the process of phagocytosis. These are produced in bone marrow cells as monocytes which have short life of only 10-20 hours. Once monocytes leave the blood they become macrophages. From bone marrow to the blood, macrophages are transported to the area of the body where they are needed. Macrophages engulf the whole body, after digesting particles (bacteria) can extrude the residual particles. Thus, provide protection by trapping and destroying microorganisms entering the tissue. They also secrete different proteins. Some of these proteins trigger the maturation of monocytes into macrophages, thereby increasing their numbers. Another protein interleukin-1 signals the brain to raise the body temperature, producing fever. The higher temperature aids the immune response and inhibit the growth of invading microorganisms.

Role of natural killer cells in maintaining homeostasis

They are another class of white blood cells that don’t directly attack invading microbes. Instead they strike at the body’s own cells that have been invaded by viruses. Virus infected proteins bear viral proteins on their surfaces. Natural killer cells recognize and kill cancerous cells. They secrete proteins into plasma membrane of the infected or cancerous cells. They also secrete enzymes that break up some of the molecules of the target cells, as a result the target cell soon dies.


6 0
3 years ago
Which describes a grizzly bear's habitat? All the biotic factors in the ecosystem all the abiotic factors in the ecosystem the r
borishaifa [10]

<em><u>A </u></em><em><u>habitat </u></em><em><u>contains </u></em><em><u>the </u></em><em><u>homes </u></em><em><u>or </u></em><em><u>habitats </u></em><em><u>of </u></em><em><u>these </u></em><em><u>species.</u></em><em><u>.</u></em><em><u>. </u></em><em><u> </u></em><em><u>It </u></em><em><u>is </u></em><em><u>the </u></em><em><u>actual </u></em><em><u>home </u></em><em><u>of </u></em><em><u>all </u></em><em><u>species.</u></em><em><u>.</u></em><em><u>. </u></em><em><u>Our </u></em><em><u>houses </u></em><em><u>are </u></em><em><u>actually </u></em><em><u>our </u></em><em><u>habitats.</u></em><em><u>.</u></em><em><u>. </u></em>

<em><u>Therefore, </u></em><em><u>the </u></em><em><u>answer </u></em><em><u>is</u></em><em><u>:</u></em>

<em><u>the </u></em><em><u>physical </u></em><em><u>area </u></em><em><u>where </u></em><em><u>the </u></em><em><u>bear </u></em><em><u>lives</u></em>

4 0
3 years ago
Read 2 more answers
What is the difference between fibrous protein and globular protein​
BARSIC [14]

Answer:

Fibrous proteins are generally composed of long and narrow strands and have a structural role.

Globular proteins generally have a more compact and rounded shape and have functional roles.

Explanation:

fibrous proteins ARE something, whereas globular proteins DO something.

5 0
3 years ago
Consider the following statement: Bacteria can exchange genetic material through conjugation without the need for any protein st
Ghella [55]

Answer:

<h2>FALSE.</h2>

Explanation:

Bacteria exchange genetic material  through conjugation with the help of proteins and various other factors.

It is the temporary union of two bacteria for the exchange of genetic material.

Steps  :

An F+ donor (donor bacteria) cell contains its chromosomal DNA and an F plasmid.

It uses its pilus to attach to the recipient cell, and then these two cells are pulled together.

Then A channel forms between the cytoplasms of the two cells, through which conjugation occurs.

3 0
4 years ago
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