Which is the main reason toads must lay eggs in water?A. The eggs do not have a shell to prevent water loss.
B. The eggs need to absorb nutrients from water.
C. The eggs are not laid in nests.
D. The eggs need protection from predators.

Answers

Answer 1

Answer: The answer is A. The eggs do not have a shell to prevent water loss.

Toad's eggs do not have a shell, like reptile eggs or bird eggs. Shell is important because it protects eggs from drying out if they are laid in the land. Toads lay eggs in a jelly-like glycoprotein. Thanks to glycoprotein around toad's eggs, contact with water is maintained all the time so that eggs don't die.

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A(n) contain many phyla

Answers

Kingdom contains many phyla since a Kingdom is made up of groups of closely related phyla.

The nine different classes of vertebrates includea. four ﬁsh classes and amphibians, reptiles, birds, whales and mammals.
b. four ﬁsh classes and amphibians, reptiles, birds, mammals and primates.
c. ﬁve ﬁsh classes and amphibians, reptiles, birds, and mammals.
d. ﬁve ﬁsh classes and amphibians, reptiles, monkeys, and mammals.

Answers

The correct answer is C= I think so

Estimate the tax on a $198 stereo when the sales tax is 5.25%.

Answers

all you have to do is multiply 198 and 5.25% and you will get the tax number 10.394

A weakened immune system may be caused by

Answers

Answer:

Immunodeficiency disorders is the answer on edg2020!

A weakend immune system may be caused by Drinking too much alcohol

Which of the following occurs in the upper respiratory system? A)air enters the alveoli
B)air enters the bloodstream
C)air is filtered and moistened
D)air is delivered to muscles

Answers

The correct answer is Option C

The air enters the nasal cavity and it is filtered and moistened their. This is done by the mucous membrane that is present on the inner side of the nasal passage.

The air is filtered and the dust particles gets attached to the mucous and the filtered air is send inside for the exchange of gases.

c.............................

The right ventricle transports oxygenated blood to the lungs true or false

Answers

I believe the correct answer is FALSE.

Explanation:

The heart is an organ located at the center of the chest in the thoracic cavity and functions to supply blood to and from tissues giving the tissues oxygen and nutrients while taking away carbon dioxide and waste products. It is divided into 4 chambers and 2 chambers are separated by a muscular wall that prevents mixing of the blood.

Further Explanation:

Blood enters the heart via the vena cava which is divided into the superior vena cava that recieves blood from the upper region of the body that includes the head, neck and chest while the inferior vena cava recieves blood from the lower extremeties that includes the legs, the abdomen, the pelvic region and the thighs. The blood is deposited into the right atrium and is de-oxygenated. When it is deposited into the right atrium, the change in volume of the atrium and the expansion causes the valve to open and allow the de-oxygenated blood to flow into the right ventricle. The right ventricle then pumps the blood that is de-oxygenated to the lungs via the pulmonary artery which is the only artery that pumps de-oxygenated blood. In the lungs, carbon dioxide is removed and oxygen added to the blood and is taken to the left atrium which pumps the oxygenated blood to the left ventricle and then the left ventricle pumps the oxygenated blood to the rest of the body. The blood is then again taken through the body via the capillaries and the veins pick up the blood that has been removed of oxygen and added with carbon dioxide and transport the blood back to the heart via the vena cava. It enters the right atrium via both the inferior and superior vena cava and the de-oxygenated blood is circulated again to the lungs for oxygenation from the left ventricle.

Learn More:

Learn More about types of circulation: brainly.com/question/1615925

Learn more about the heart: brainly.com/question/12945500

Learn more about the circulatory system: brainly.com/question/919984

Level: High School

Subject: Biology

Topic: The Circulatory System

The statement “the right ventricle transports oxygenated blood to lungs” is false.

Further Explanation:

Heart of humans have four chamber namely right and left atrium also, right and left ventricle. The main purpose of heart is to pump blood throughout the body. Due to this constant beating of heart a pressure is maintained in the body which helps in the flow of the blood.

The heart receives the deoxygenated blood from the body parts. This blood reaches the right atrium by means of superior and inferior vena cava. The blood from right atrium is pushed to the right ventricle. So, the right ventricle always has deoxygenated blood. This blood is then pushed to the lungs by the means of pulmonary artery into the lungs.

This blood then gets oxygenated by the means of fusion through capillaries and returns back to the heart specifically, to the left side. This blood is then pumped to the organ systems where it provides the tissues with oxygen.

Important note-

a. The right side of the heart always has deoxygenated blood.

b. The left side of the heart has oxygenated blood.

Therefore, the statement that the right ventricle of the heart has oxygenated blood is not true.

Learn More-

1. Learn more about primary succession brainly.com/question/1386621

2. Learn more about energy storage brainly.com/question/523624

3. Learn more about transfer RNA brainly.com/question/236807

Answer Details:

Grade: Middle School

Subject: Biology

Chapter: Human Physiology

Keywords:

Heart, ventricle, atrium, right atrium, left atrium, right ventricle, left ventricle, oxygenated blood, deoxygenated blood, pulmonary artery, SA node, lungs, oxygenation of blood.

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