Describe the process of fertilization

Answers

Answer 1

Answer:

Explanation:

Fertilization is the process by which haploid gametes (n- sperm and egg) fuse together to form a diploid cell called ZYGOTE. A gamete is a reproductive or sex cell produced by a sexually-reproducing organism during meiosis. Diploid organisms produce gametes that contains one set of chromosomes i.e haploid. Male organisms produce sperm while female organisms produce egg/ovum.

To ensure that the zygote, which grows into the full organism, has the correct number of chromosomes, only one sperm can fuse with one egg. It is worthy to note that, fertilization can either occur internally (union of sperm and egg within the body of the female parent) or externally (joining of gametes outside the body).

Answer 2

Answer: The sperm plasma then fuses with the egg's plasma membrane, the sperm head disconnects from its flagellum and the egg travels down the Fallopian tube to reach the uterus. In vitro fertilization (IVF) is a process by which egg cells are fertilized by sperm outside the womb, in vitro.

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In a dihybrid cross, round (RR), yellow (YY) seeds were crossed with wrinkled (rr), green (yy) seeds. What were the phenotypes of the F1 generation?

Answers

The answer is

Let's first represent alleles:
R - a dominant allele for round seeds,
r - a recessive allele for wrinkled seeds,
Y - a dominant allele for yellow seeds,
y - a recessive allele for green seeds.

The cross will look like this RRYY x rryy
So, all of the offspring will be heterozygotes (RrYy) with round seeds (Rr), yellow seeds (Yy).

What part of a neuron carries nerve impulses away from the cell body

Answers

Axon- A long fibre that carries impulses away from the cell body.

1. Why are kids afraid of ghosts? 2. Should I feed the raccoons that visit my trash can? 3. How does mouse color affect mouse survival? 4. Does a mother duck love her babies? Which statement correctly identifies the scientific question and describes why the question is scientific? Question 1 refers to the supernatural. Question 2 reflects a moral or social value. Question 3 leads to a hypothesis that can be tested. Question 4 reflects a question that can't be observed.

Answers

Answer:

The correct answer is - statement - Question 3 leads to a hypothesis that can be tested.

Explanation:

A scientific question is a question that can be answered by logic and reasoning with the help of a hypothesis that can be tested and analyzed by the scientific experient and scientific method.

One can use testing and experimentation to answer the question, survivability of a mouse depend on the color of the mouse is questions based on scientific ideas.

So, supernatural, morality, opinions can not be the base of the scientific questions.

Answer: C

Question 3 leads to a hypothesis that can be tested.

Which mixture of gases is thought to have made up Earth's early atmosphere? A. methane, oxygen, hydrogen, water vapor B. carbon dioxide, nitrogen, oxygen, ozone C. hydrogen, water vapor, ammonia, methane, carbon dioxide D. ozone, water vapor, carbon dioxide, ammonia

Answers

The answer is D. ozone, water vapor, carbon dioxide, ammonia.

We really don't know what early earth's atmosphere contained. We can only speculate. Likely, it contained methane at some point, along with other noxious gases from erupting volcanoes.

Diabetes mellitus is a disease that occurs when which organ does not regulate the amount of glucose in the blood?

Answers

The answer to the question given is letter C. Pancreas.
Diabetes mellitus is a disease that occurs when an individual's pancreas does not regulate the amount of glucose in the blood.

The set of options to the question above are:
A. adrenal B. hypothalamus C. pancreas D. parathyroid

The sodium-potassium pump in animal cells requires cytoplasmic ATP to pump ions across the plasma membrane. When the proteins of the pump are first synthesized in the rough ER, what side of the ER membrane will the ATP binding site be on?

Answers

Answer:

It will be on the cytoplasmic side of the endoplasmic reticulum

Explanation:

The inner mitochondria protein called Adenine Nucleotide Translocator or ADP/ATP carrier protein, maintains the transport of ADP into the matrix of the mitochondria from the cytoplasm for ADP to be available for ATPase synthesis of ATP, from ADP and Pi(inorganic phosphate ion) during chemiosmosis of oxidative phosphorylation in the mitochondria.

The same carrier proetin also convey the synthesized ATPs back to the Cytoplasm for cellular utilization.

Therefore the ATP binding site should at the cytoplasmic side of the E.R, because the cytoplasm of the E.R is the site of deposits of synthesized ATP s, thus proximity of the ATP-binding site to it is needed.

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