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3 years ago

Life on earth began as the product of chemical reactions which occurred

Biology

1 answer:

Kazeer [188]3 years ago

7 0

Answer: Over 4 billion years ago

Explanation: The chemical reactions between carbon and water is said to bring about life according to scientists. These reactions builds largely upon four families of chemicals (lipids, carbohydrates, amino acids, and nucleic acids).

However, the actual time of life on Earth has varying speculations from different scientists in fields of study (such as molecular biology, chemistry, oceanography, etc).

Furthermore, microfossils within hydrothermal-vent precipitates dated from 3.77 to 4.28 billion years is presumed to inhabit the oldest record of life on Earth. Hence, which is presumed to have occurred after ocean formation 4.4billion years ago.

Thus, the actual date of the chemical reactions that brought about life is not rigid, but presumed to have occurred over 4billion years ago (according to research).

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Identify the suggested set of activities for the given

kotegsom [21]

The suggested set of activities for the corresponding principles regarding the Programs and teachers is explained below.

<h3>How to explain the information?</h3>

1. Programs and teachers engage families in ways that are truly reciprocal.

Programs and families can benefit from shared resources and information.
Teachers seek information about children’s lives, families, and communities.

2. Programs invite families to participate in program-level decisions and advocacy efforts.

Programs invite families to actively participate in making decisions about the program itself.
Programs also invite families to advocate for early childhood education in the wider community.

3. Programs invite families to participate in decision-making and goal-setting for their children.

Programs invite families to actively take part in making decisions concerning their children’s education.
Teachers and families jointly set goals for children’s education and learning both at home and at school.

4. Programs provide learning activities for the home and in the community.

Programs use learning activities at home and in the community to improve each child’s early learning.

5. Programs implement a comprehensive, program-level system of family engagement.

Programs institutionalize family engagement policies and practices and ensure that teachers, and other staff receive the supports they need to fully engage families

6. Teachers and programs engage families in two-way communication

Strategies allow for both school- and family-initiated communication that is timely and continuous.

Conversations focus on a child’s educational experience as well as the larger program.

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2 years ago

Composting helps the environment by reducing the amount of solid waste that is deposed in landfills. What is an example of a sol

ratelena [41]

I believe the answer would be D) kitchen scraps and grass clippings

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3 years ago

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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.

<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.
<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

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3 years ago

What do glucose, starch, and cellulose have in common?

Contact [7]

They are forms of sugar and proteins, they are all carbohydrates and they are all related to photosynthesis.

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3 years ago

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