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juin [17]
2 years ago
7

Among the options listed, which came first and shows up in the earliest fossils?

Biology
1 answer:
Oksana_A [137]2 years ago
6 0

cyanobacteria

it is one of the earliest organisms

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Which characteristic of living things is important to the survival of a group of animals rather than an individual member of thi
sammy [17]

Answer:

If a whole specie of organisms has to survive, they should must possess the ability to reproduce and adopt to environmental conditions in better way.

For example: If a disaster occurs or a condition of unfavorable weather occurs, the specie will survive even if only few members remain alive. Because those members will reproduce and regrow the community.

The reason is this that reproduction is not important for the survival of one organism, like organism will still survive even if he do not reproduce, but if a whole specie has to survive and continue, reproduction is most important trait.

Hope it help!

5 0
3 years ago
How often does the body perform cellular respiration?. A.once in the morning and once at night. B.only at night. C.continuously.
Arturiano [62]
The body actually performs cellular respiration continuously. The correct option among all the answers that are given in the question is the third option or option "C". The other options that are given are wrong and so can be avoided. I hope the answer has actually come to your help.
5 0
3 years ago
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4.) How can physical and<br> chemical properties identify<br> a substance?
Illusion [34]

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. ... To identify a chemical property, we look for a chemical change.

4 0
3 years ago
The stethoscope is a device commonly used by doctors to monitor heart function. When listening to a heart beating using a stetho
Effectus [21]

Answer:

The correct answers are:

1. closing

2. the ventricles and arteries,

3. a constricted trachea

Lub is the first sound of a heartbeat and is mentioned as S1. It is usually produced due to the closing of tricuspid and and mitral or bicuspid valves present between atria and ventricles.

Tricupsid is located between atrium and ventricle of the right hand side and mitral valve is located between atrium and ventricle of the left hand side. They prevent the back flow of blood from ventricles to their respective atria.

Dub, being the second sound is written as S2. It is produced due to the closing of pulmonary (located between right ventricle and pulmonary artery) and aortic valves (located between left artery and aorta).

These valves prevent the back flow of blood from arteries into the ventricles.

The time between the two sounds is often taken as the measure of the diastole i.e. ventricular filling.

Wheezing refers to a high-pitched sound produced when a person breathes, especially during exhale. It is caused by constriction of the airways or inflammation. It is considered as a symptom of various diseases such as asthma, COPD, allergies, bronchitis etc.

8 0
3 years ago
A heterozygous dominant green pea plant is crossed with a homozygous recessive yellow pea plant.
iren [92.7K]

Answer:

3 choice

Explanation:

cause i know.

6 0
3 years ago
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