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Eva8 [605]
3 years ago
12

Explain they transitional fossils provide powerful evidence for common descent

Biology
1 answer:
Soloha48 [4]3 years ago
5 0

Answer:

Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. ... Paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms.

Explanation:

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Question 48 (1 point)
miskamm [114]

Most of the functions of your intestines are a result of the signals sent by your autonomic nervous system (ANS). It is a fundamental constituent of the peripheral nervous system.

<h3>What is the autonomic nervous system?</h3>

The autonomic nervous system (ANS) refers to a fundamental part of the peripheral nervous system capable of regulating diverse physiological functions.

This system (autonomic nervous system) is responsible for regulating involuntary processes such as blood pressure, heart-pumping, respiration rate, digestion, etc.

The parts of the autonomic nervous system include the sympathetic nervous system and parasympathetic nervous system.

Learn more about the autonomic nervous system here:

brainly.com/question/4143211

4 0
3 years ago
Are there any parts of the human body that get oxygen directly from the air and not from the blood? Write your answer below.
Leya [2.2K]

Answer:

The cornea

Explanation:

The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air.

7 0
3 years ago
Read 2 more answers
Difference between material and apparatus
dalvyx [7]
One's material and one's apparatus?
3 0
4 years ago
The heart is a cone-shaped muscular organ located within the ________ of the thorax. its apex rests on the ___________ and its s
Arte-miy333 [17]
<u>The heart is a cone-shaped muscular organ located within the mediastinum of the thorax.</u>

The mediastinum is the space lined with membranous tissue between the lungs. The mediastinum contains not only the heart but also the great vessels (pulmonary artery, aorta, pulmonary veins, and the superior and inferior vena cava), as well as parts of the esophagus and the trachea.

<span><u>Its apex rests on the </u><u>diaphragm</u><u> and its superior margin lies at the level of the </u><u>2nd</u><u> rib.</u>
</span>
The apex of the heart is the conical area created by the confluence of the ventricles, but mainly by the left ventricle. It rests on the diaphragm. The superior margin of the heart, also known as the base, lies at the level of the second rib.

<span><u>Approximately two-thirds of the heart mass is seen to the left of the </u><u>midsternal border</u><span><u>.</u>
</span>
This is because to the left of the midsternal border lies the left ventricle which comprises most of the heart mass as the left ventricle is the one responsible for pumping blood throughout the systemic circulation and significant pressure should be overcame; resulting to the physiologic hypertrophy of the left ventricle.

</span><span><u>The heart is enclosed in a serosal sac called the </u><u>pericardium</u><u>. The loosely fitting double outer layer consists of the outermost fibrous pericardium, lined by the parietal layer of the serous pericardium.</u></span>

The pericardium is one of three layers of the heart (other ones being the myocardium and the endocardium); and is the outer layer of the heart. The pericardium is composed of two tissues, the fibrous pericardium and the serous pericardium. The pericardium functions to lubricate the movement of the heart by the action of the pericardial fluid. 

<span><u>The heart has </u><u>four</u><u> chambers. R</u></span><span><u>elative to the roles of these chambers, the </u><u>atria </u><u>are the receiving chambers, </u></span><span><u>whereas the </u><u>ventricles </u><u>are the discharging chambers.</u>
</span>
The four chambers of the heart are namely the right atrium, right ventricle, left atrium, and the left ventricle. Venous blood goes to the right atrium via the vena cavas then to the right ventricle via the tricuspid valve; then to the pulmonary circulation via the pulmonary artery where it will be oxygenated. From the pulmonary circulation, the left atrium will receive the oxygenated blood via the pulmonary veins then to the left ventricle via the mitral valve where it will be pumped to the systemic circulation via the aorta.
6 0
3 years ago
Which mRNA sequence is the complement to the DNA sequence GATCACMany different types of mutations can occur within the body. Cys
cricket20 [7]

Answer:

The mRNA sequence that complements the DNA sequence GATCAC is CUAGUG.

Explanation:

A is adenine, which in DNA, pairs up with Thymine.

In mRNA, A pairs up with U, Uracil. Uracil is simply Thymine's replacement in mRNA.

In both mRNA and regular RNA, G, Guanine, and C, cytosine, always pairs up.

To find the sequence, I followed the sequence, but just switched it up with its pairs, getting CUAGUG from GATCAC.

<em>Hope this helped and good luck :)</em>

8 0
3 years ago
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