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Alenkasestr [34]
3 years ago
9

What evidence supports rna as the origin of genetic material? campbell?

Biology
1 answer:
zloy xaker [14]3 years ago
5 0
I need answer chooses to help .
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Which way does the sun's gravity act on any body in orbit
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Pulls it toward the sun.
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A taiga biome is DIFFERENT from a tundra biome because it has
AysviL [449]

Answer:

The correct answer would be A) many coniferous trees.

Taiga and tundra represent the two coldest biomes of the land on the planet.

The average annual temperature of taiga lies between 41° Fahrenheit and 23° Fahrenheit whereas the temperature of the tundra lies below 23° Fahrenheit throughout the year.

It makes the major difference between the plant life of the two biomes. The taiga is characterized by the presence of coniferous forests which consist of spruces, pines, and larches.

In contrast, vegetation in the tundra is mainly composed of grasses, shrubs, mosses, sedges, and lichens.

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Select the correctly described examples of host defense mechanisms. Check All That Apply Innate anatomical and physiological bar
deff fn [24]

Answers: examples of host defence mechanism include: Innate anatomical and physiological barriers, Innate cellular and chemical defenses.

Explanation:

The capability of the human body to resist almost all types of organisms or toxins that tend to damage the tissues and organs is known as IMMUNITY. This host defence mechanism can be classified into INNATE or adaptive immunity.

The immunity that results from general processes, rather than from processes directed at specific disease organisms is called the INNATE IMMUNITY. The anatomical and physiological barriers of the innate immunity provides the first line of defence against pathogens. Examples of these barriers of the innate immunity includes:

--> Destruction of swallowed organisms by the low stomach pH and digestive enzymes

--> The vigorous mucociliary clearance mechanisms of the respiratory airways and lungs.

--> Resistance of the skin to invasion by organisms

While examples of innate cellular and chemical defenses include:

--> Phagocytosis of bacteria and other invaders by white blood cells and cells of the tissue macrophage System

--> lysozymes, a mucolytic polysaccharide that attacks bacteria and cause them to dissolute.

--> basic polypeptides which react and inactivate certain types of gram- positive bacteria

-->natural killer lymphocytes that can recognize and destroy foreign and tumor cells.

4 0
3 years ago
In feeding relationship models like food chains and food webs, the arrow points towards
sergij07 [2.7K]

Answer:

The arrow points from the organism being eaten to the organism that eats it.

Explanation:

4 0
3 years ago
Name four functions of micro-organisms in the digestive system of ruminants​
Dennis_Churaev [7]

I don't know answer to this question, but I can explain what it wants for you to name, if that would helped you.

It says that you have to find 4 doings of bacterias (micro-organisms) in the organ system for digestion.

5 0
3 years ago
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