Place the events of fertilization and implantation in order. 1. Implantation of the developing embryo. 2. The developing embryo becomes a blastocyst which consists of a hollow ball of cells. 3. Mitosis occurs in the Fallopian tube. 4. The cortical reaction occurs, preventing polyspermy. 5. The egg is fertilized by the sperm.

Answers

Answer 1

Answer:

Answer:

The correct order is

5, 4 , 3, 2, 1

Explanation:

The first stage is the fusion of sperm with egg in fallopian tube which induces chemical reactions that prevents fusion of multiple sperm with one egg. This is known as preventing polyspermy.

After this the fused egg starts dividing and growing through the process of mitosis. The growing zygote reaches the stage of morula after few cell division and continues the division process till it reaches the stage of blastocyst.

The blastocyst now move down the fallopian tube to attach to the wall of uterus. This stage is known as implantation.

Hence, the correct order is 5, 4 , 3, 2, 1

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Which are the physical (P), chemical (C), and biological (B) immune responses?P: complement system; C: saliva; B: coughing
P: coughing; C: saliva; B: complement system
P: coughing; C: sneezing; B: complement system
P: complement system; C: saliva; B: sneezing

Answers

The answer is P: coughing; C: saliva; B: complement system.

Coughing is a physical immune response because it mechanically (physically) removes irritants and pathogens from the lungs. Sneezing is also the physical immune response.
Saliva is a chemical immune response because it contains different enzymes able to break down pathogens.
Complement system is a biological immune response because it activates biological molecules, such as antibodies, to remove pathogens from the organism.

Answer:

B)P: coughing; C: saliva; B: complement system. would be your answer

if there is no oxygen during the cellular respiration process, the Krebs cycle does not occur. True or False

Answers

the answer is gonna be false

this statement is False.

1. Why were populations able to get so big? What happened that allowed this to happen?2. What do you think will happen if the populations of humans continued to increase

3. What could happen that could limit the population or cause it to decrease ( Stop growing )

Answers

Answer:

1. reproduction

2. we could run out of food as not enough is produced fast enough

3. lack of food, women and men who are infertile or diseases which can kill people

Cell division is preceded by two growth phases. Besides growth, both G1 and G2a. contain checkpoints that determine if the cycle will continue.
b. help move chromosomes to the new daughter cells.
c. produce more chromosomes before the cell divides.
d. grow and produce enough cytoplasm to fill two cells.

Answers

The answer is a. contain checkpoints that determine if the cycle will continue. Cell cycle checkpoint are important mechanisms that control cell division. There are two checkpoints during the cell cycle: G1 and G2 checkpoint. The G1 checkpoint is right before the S phase. If something is wrong at the G1 checkpoint, the cell will not enter the S phase where DNA replication starts. The G2 checkpoint (DNA damage checkpoint) is right before the M phase. If DNA is damaged, the cell will not enter the M phase (mitosis).

1. Mike injured his knee while playing. Examination revealed that the injured area was red, swollen, and warmer than the surrounding area. What does this condition indicate?an inflammation

a tumor–like growth

a hemorrhage

2. When a virus invades the body, some B cells recognize it as nonself and produce plasma cells that release a substance to kill the virus. What is this substance called?

antigen

antibody

pathogen

3. Which of the following forms blood clots?

fibrin

macrophages

thrombin

4. An antigen has invaded a mammal's body. Specific immune cells engulf and ingest it. Some of the digested pieces are displayed on the cells' bodies. What happens next?

B cells are activated and release antibodies.

T cells are activated and produce clones.

B cells withdraw the immune response as the antigen is killed.

Answers

1. Inflammation

2. Antibody

3.Thrombin

4. B cells are activated and release antibodies.

Final answer:

The conditions described by Mike all point to an inflammation, not a tumor-like growth or hemorrhage. When a body is invaded by a virus, B cells produce antibodies to destroy it. Fibrin is responsible for blood clot formation. When pieces of a digested antigen are displayed on a cell's body, it prompts T cells to activate and produce clones.

Explanation:

1. Mike's knee injury which revealed a red, swollen, and warmer area than the surrounding indicates an inflammation. This is a protective response to injury or destruction of tissues which serves to destroy, dilute, or wall off the injurious agent and the injured tissue.

2. When a virus invades the body, some B cells recognize it as foreign and produce plasma cells that release a substance to kill the virus. This substance is referred to as an antibody.

3. Fibrin is responsible for the formation of blood clots. It is a fibrous protein that helps control bleeding and forms a meshwork at a wound site, creating a clot to prevent further bleeding.

4. When an antigen invades a mammal's body, specific immune cells engulf and digest it. The digest pieces are displayed on the cells' bodies leading to the activation of T cells which then produce clones.

Learn more about Immunology here:

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Ventifacts are created by a process of erosion called

Answers

The correct answer to the question above is abrasion. Ventifacts are created by a process of erosion called abrasion. Ventifacts are these rocks who were abraded and polished by ice crystals or wind-driven sands. Abrasion is the process of wearing or scraping away.

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Organelle that modifies packages and transports materials out of the cell