What two layers of the egg must the sperm penetrate to reach the egg's plasma membrane?

How are babies made? i need this for health class.

ArbitrLikvidat [17]

hi there

your answer to this is :Sperm begin of its developing in the testicles, the two glands in the scrotal sac beneath the penis. of the resulting embryo of depends on which type of sperm burrows into the egg first into the egg . Sperm with a Y chromosome make a boy baby, but sperm with an X chromosome make a girl.

I hope this helps you out

have a great evening

FaithRawlins14

5 0

3 years ago

Read 2 more answers

Why are mosses called pioneer plants?

JulijaS [17]

Answer:

The first organisms to appear in areas of primary succession are often mosses or lichens. These organisms are known as pioneer species because they are the first species present; pioneer species must be hardy and strong, just like human pioneers.

Explanation:

8 0

2 years ago

A lack of awareness of oneself or one's surroundings is called

zhenek [66]

Answer: Delirium

A person who suffers delirium experience lack of awareness of oneself or one’s surroundings. Delirium is a serious disturbance in mental abilities results in confused thinking and reduced environmental awareness. This manifestation is transient and usually reversible but it can occur at any age especially in elderly who have previously compromised mental status.

6 0

3 years ago

Identify three immune system organs and their functions.

PIT_PIT [208]

Answer:

Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes.

Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils, and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.

Also...

Bone marrow is a sponge-like tissue found inside the bones. That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. Over the course of our life, more and more red bone marrow turns into fatty tissue. In adulthood, only a few of our bones still contain red bone marrow, including the ribs, breastbone, and pelvis.

3 0

3 years ago

Which of the following statements is true about Tiktaalik?

yawa3891 [41]

Tiktaalik is a transitional fossil which shows how fish evolved into amphibians and reptiles. So the correct option is B.

What is Tiktaalik?

Tiktaalik is a direct ancestor of tetrapods or four-legged animals. It is an extinct fish-like animal and it lived on earth 380-385 million years ago (Devonian period).

The word Tiktaalik is derived from the Inuktitut language which loosely translates to large freshwater fish. This animal had characteristics of both fish and tetrapod and is therefore called the link between these two kinds of animals.

The characters resembling fish are gills and scales and the characters resembling tetrapods are rib bones, movable neck and lungs. There are characters that are a mix of both tetrapods and fish. These are bones and joints in limbs but fish-like fins instead of feet or hands.