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den301095 [7]
3 years ago
14

Which has an important role in how species change over time?

Biology
1 answer:
Mazyrski [523]3 years ago
3 0
Mutations have an important role in how species change over time.
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What substance is considered a building block for all living things?
kondaur [170]
~Hello there!

Your question: What substance is considered a building block for all living things?

Your answer: Carbon is the substance that is considered s building block for all living things.

Any questions ^?

Happy Studying!
3 0
3 years ago
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HELP! Solar, biomass, geothermal, wind, and hydropower energy are all renewable sources of energy. They are called renewable bec
bazaltina [42]

Answer:

C. Can be replenished by nature in a short period of time

Explanation:

Renewable, as a word, means that it is able to be replaced again. Renewable energy is energy that is able to be replaced quickly, and will never run out. Solar, biomass, geothermal, wind, and hydropower energy all can be reproduced again without the risk of running out, unlike fossil fuels.

Hope this helps!

Panna

7 0
3 years ago
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Is there a mammal that lays eggs
Bess [88]
<span>Yes, there are mammals that lay eggs instead of giving birth to a live young. These mammals are called Monotremes. One best example to this is the platypus and echidnas. Platypus, which is also known as the duck-billed platypus, is a semiaquatic egg laying mammal. Echidnas on the other hand are also called as spiny eaters. Echidna and platypus are only the surviving members of the Tachyglosside. And are the sole extant egg laying mammal</span>


8 0
3 years ago
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Cerebrospinal fluid is produced by the
nikklg [1K]

Answer: Option A "Choroid plexus".

Explanation:

Cerebrospinal fluid can be defined as the fluid that is found in the brain and spinal cord of human beings. It is a clear and colorless fluid.

The production of cerebrospinal fluid takes place by the specialized ependymal cells that lies in the choroid plexuses which is present in the  ventricles of brain.

The amount of cerebrospinal fluid in a day is 500mL. This fluid acts as cushion that protects the brain from mechanical and immunological protection.

Hence, the correction answer is option A

7 0
3 years ago
WILL GET BRAINLIEST!!!
ICE Princess25 [194]

Answer:

<em>1. The characteristic thing about </em><em>adult frog breathing</em><em> is that </em><em>drawing in air by lowering their mouth floor</em><em> (option d).</em>

<em>2. The substance released by the </em><em>lung secretory cells </em><em>is the </em><em>surfactant </em><em>(option c).</em>

<em>3. The main divisions of the </em><em>peripheral nervous system</em><em> are the </em><em>somatic and autonomic systems</em><em>.</em>

Explanation:

<h3>1. Breathing of the adult frog</h3>

The adult frog - while out of the water - uses a nasal breath, propelling air into its throat and oral cavity. The air content in the frog's mouth causes the internal pressure of the cavity to increase, and the floor of the mouth is modified to allow the passage of air to the lungs.

Under water, the frog's breath is cutaneous, that is, through its skin.

Adult frogs do not have gills or respiratory muscles.

<h3 /><h3>2. Pulmonary surfactant </h3>

Pulmonary surfactant is a substance produced and secreted by the pulmonary epithelium, specifically by type II pneumonocytes. The function of the surfactant is to keep the pulmonary alveoli open to allow gas exchange.

The surfactant is a substance of a lipidic and proteic nature that helps reduce the surface tension of the water, which in the socket prevents closure when the air is exhaled.

Another function is to prevent the germs - viruses and bacteria - present in the air from passing from the alveolus to the bloodstream.

<h3 /><h3>3. Divisions of the peripheral nervous system</h3>

The peripheral nervous system is dependent on the central nervous system and is made up of all the nerves that go to each of the tissues and organs of the body. It is divided into somatic and autonomic nervous systems.

  1. <u>Somatic nervous system</u> is composed of nerves that drive nerve impulses to skeletal muscles, being predominantly voluntary. The involuntary response in this system is due to the existence of reflex arcs, whose center of integration is the spinal cord.
  2. <u>Autonomic nervous system</u> is responsible for the innervation of coughs the internal organs, allowing their function under the coordination of the central nervous system. It is an involuntary system and is subdivided into sympathetic and parasympathetic systems.

The integration of both systems, somatic and autonomic, allows a body to perform all its functions, including the function of relationship, alertness and maintenance of organic homeostasis.

Learn more:

Frog breath brainly.com/question/1341903

Pulmonary surfactant brainly.com/question/7303958

Central and peripheral nervous systems brainly.com/question/2156614

5 0
3 years ago
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