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ryzh [129]
3 years ago
9

Describe the Nebular Hypothesis Theory

Biology
1 answer:
lesantik [10]3 years ago
3 0

Explanation:

  • The solar nebular hypothesis describes the formation of our solar system from a nebula cloud made from a collection of dust and gas.
  • The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets
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In general, why might cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-posi
Zanzabum

Mutation rate of Gram negative bacteria is much greater than that of Gram positive bacteria.

Explanation:

The gram positive types of bacteria responsible for causing diseases in humans. It is called as Gram positive bacteria. Both the bacteria are different in structural and physical properties. It is defined as the group of bacteria’s which positive result in gram stain test.

Gram negative bacteria are the group of bacteria’s which gives negative result to the gram stain test. This classification is done according to the cell wall. The cause of common disease by Gram positive bacteria is our anthrax, diphtheria, etc.

3 0
3 years ago
All of the following contribute to the movement of venous blood EXCEPT A. ventricular systole B. pressure changes in the thorax
AlladinOne [14]

Answer:  B. pressure changes in the thorax

Explanation:

The veins are the blood vessels which returns the deoxygenated blood from all the tissues and cells of the body back to the heart. The ventricular systole, venous valves, activity of the skeletal muscles and neural control over venoconstriction all influence the movement of the blood in the venous.

The pressure changes in the thorax occurs due to inspiration and expiration. During the process of inspiration, the diaphragm below the lungs contracts and moves downward while the muscles of the ribs pulls downward. When the size of the thoracic cavity increase the air pressure inside the cavity decreases and vice-versa. The pressure inside the thoracic cavity is not related with the movement of the venous blood as it regulates the exchange of the gases not the blood.

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3 years ago
The role of the excretory system is to rid the body of toxic waste products. Which of the following body systems also plays a di
pshichka [43]
C
The respiratory system removes the waste carbon dioxide produced from aerobic respiration in the body.
8 0
3 years ago
How do birds digest their food in the absence of teeth?
vodka [1.7K]

Answer:

They have a gizzard to grind the food.

Explanation:

Birds cannot chew since they have no teeth. However, the beak allows them to split very large seeds or swallow them directly.

For their digestion they have a stomach where digestion enzymes are released. Also they have a gizzard that is an organ that grinds the food mechanically. This gizzard usually has small stones inside that were previously ingested and that helps to digest the food.

3 0
2 years ago
Which is the best definition of resistance?
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B. Resistance is the tendency for materials to oppose the flow of electric charges.
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