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Damm [24]
2 years ago
11

The body's natural defense against infection is called:

Biology
1 answer:
meriva2 years ago
6 0

Answer:

The immune system is the body's defense against infections and other diseases.

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GUYS PLEASE HURRY!! I need this finished in 20 mins :/ i missed a day. Im offering 100 brainly points
Andru [333]

Answer:

A.

1. energy

2. nutrients

3. calories, water

4. metabolic rate

5. nutrients

6. weight and height

B.

1. protein, amino acids

2. viruses

3. carbohydrates, energy

4. fibers, glucose

5. fats

a. molecular

b. 'healthy'

Explanation:

please give me brainliest and you're welcome

7 0
2 years ago
Question 5 unsaved in a tide pool, 15 species of invertebrates were reduced to 8 after one species was removed. the species remo
sesenic [268]
The species was a keystone species.

Keystone species are the species that ''hold the ecosystem together''.
They have an important role in the trophic networks (food chains) and often they can even afflict changes in the abiotic part of the ecosystem (change the composition of soil, purify the water, lower the effect of the wind etc)
Therefore, when a keystone species is removed it affects greatly the whole ecosystem.
8 0
3 years ago
Which of the following does NOT contribute to sea level rise?
Andrei [34K]

Answer:

D is the correct option

Explanation:

expansion of water is not significant over day night temperature

7 0
2 years ago
Which of the following cause the ventricles to contract?
vovikov84 [41]

Answer:

D. All of the above

Explanation:

In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Generally, the cardiac cycle occurs in two (2) stages;

1. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.

2. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.

Cardiac output can be defined as the volume of blood that is being pumped by the mammalian heart through the left and right ventricle per unit time (minute).

The following conducting systems of the heart cause the ventricles to contract;

I. Atrioventricular (AV) node: it's a component of the electrical conduction system of the mammalian heart located in the Koch triangle which connect the ventricles and atria electrically.

II. Atrioventricular (AV) bundle: it's a specialized tissue that transmits electrical impulse from the atrioventricular (AV) node to the Purkinje fibres of the ventricles.

III. Purkinje fibers: it's a network of specialized cells that comprises of glycogen and they transmit cardiac action potentials in a rapid manner from the atrioventricular (AV) bundle to the myocardium of the ventricles.

Furthermore, the right atrioventricular valve (AV) also referred to as the tricuspid valve is located on the right dorsal side of the human heart. The right atrioventricular valve (AV) comprises of three (3) leaflets (flaps) which opens and closes in order to allow for the flow of blood from the right atrium of the human heart to the right ventricle. Also, the right atrioventricular valve is saddled with the responsibility of preventing blood from flowing backward in the mammalian heart.

6 0
2 years ago
Some organisms can reproduce both sexually and asexually. Being able to reproduce asexually is beneficial in situations where ma
Ber [7]
"It will increase the frequency of genetic mutations. *i think this one* It will result in reduced genetic diversity within the species. It will make the species unable to reproduce sexually. It will decrease the life span of the species." - hope that helps not my work tho some one else wrote this
7 0
3 years ago
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