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Anton [14]
3 years ago
6

Brainliest Are dolphins mammals A. yes B.no C. i dunno

Biology
1 answer:
Shalnov [3]3 years ago
3 0

Answer:

A dolphins are mamals because they give live birth.

Explanation:

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She notices that the muscle cells are loaded with mitochondria while the macrophages have abundant lysosomes. why is this so?
Kaylis [27]

The muscle cells are loaded with mitochondria to allow large amounts of ATP production while the macrophages have abundant lysosomes to digest the debris and dead organisms like bacteria.

Mitochondria are known as the powerhouse of a cell. This is because most of the ATP production used by various systems in their operation is produced by mitochondria. A chemical called NADH is produced in the mitochondrial matrix through the Krebs cycle. The enzymes embedded in the mitochondrial membrane use this chemical to produce Adenosine Triphosphate, generally known as ATP.

Macrophages are phagocytic white blood cells involved in engulfing and killing pathogens. They are involved in the innate immune response of the body. Lysosomes have specialized enzymes that can kill these pathogens.

Muscle cells need to contract or expand for which they require energy. Thus, they have abundant mitochondria. Whereas, the macrophages have abundant lysosomes to help them kill disease-causing pathogens like a virus or bacteria.

To know more about ATP production in mitochondria, refer to the following link:

brainly.com/question/16876656

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3 0
1 year ago
Human populations in low-UV environments tend to have more lightly pigmented skin. One explanation is that the selective pressur
nikdorinn [45]

Answer:

Lightly pigmented people tend to be at higher risk of vitamin D deficiency

Explanation:

BACKGROUND KNOWLEDGE:

Human skin is the largest organ of the body which makes boundary line between environment and internal conditions.  Human skin cell produces pigment called melanin when ever it is subjected to Sun. More the melanin pigment produced more will be the skin darkens. Ultraviolet (UV) radiations also come from Sun and responsible for more pigmentation.

ANSWER EXPLANATION:

According to the question darkly pigmentation only occurs when their is high level of UV radiations. High level of UV radiations are also responsible for Vitamin D production.

People with lightly pigmented means that there environment has low level of UV radiations which are the requirement of Vitamin D production. Hence due to low UV radiations peoples with light pigmentation's are also be at higher risk of vitamin D deficiency

7 0
3 years ago
Circulating throughout the body, adh arrives at the ____________ of the kidneys.
gogolik [260]
<span>Circulating throughout the body, adh arrives at the nephrons of the kidneys, Nephrons are the basic microscopic functioning unit of the kidneys. Our kidneys consist of millions of nephrons.
ADH stands for anti-diuretic hormone and it is also known as vasopressin and  it is secreted by the pituitary gland and it helps the kidney to maintain the water in the body.</span>
6 0
3 years ago
What are some benefits about predicting a natural disaster and knowing when and where it will occur?
larisa86 [58]

Answer:

Predictions and warnings can also reduce damage and economic losses. When notice of an impending disaster can be issued well in advance, as it can for some riverine floods, wildfires, and hurricanes, property and natural resources can be protected.

Explanation:

8 0
2 years ago
Leaves are important plant structures because they
ra1l [238]
The answer is c. Inside leaves, there's a lot of chloroplast, which contains chlorophyll for photosynthesis. This can make energy.
4 0
3 years ago
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