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2 years ago

Where does fertilization take place in the moss life cycle?

Biology

1 answer:

Lilit [14]2 years ago

3 0

Answer:

Archegonium

Explanation:

Mosses reproduce by alternating between the sporophytic (diploid) and gametophytic (haploid) phases. The gametes (sperm and eggs) are produced in gametophytic organs; archegonium (female) and antheridium (male) located on the tips of the separate female and male gametophytes.

The haploid sperm also called antherozoids produced by the antheridium, swims in a moist medium towards the archegonium and fertilizes the haploid egg in this organ. A zygote results from this fusion and grows into a diploid sporophyte (which grows and obtains nutrient from the gametophyte).

The sporophyte undergoes meiosis to produce haploid spores, which ultimately forms protonema (buds that grow into gametophyte). The cycle continues again.

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List the three components that comprises a nucleotides

Cerrena [4.2K]

Nitrogeneous bases
sugar
phosphate group

3 0

2 years ago

On the ventral surface of the brain, you can observe the optic nerves and chlasma, the pituitary gland, and the mammillary bodie

ivann1987 [24]

Answer:

Diencephalon.

Explanation:

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6 0

2 years ago

Read 2 more answers

Imagine you are cutting a bagel (one of the most common household injuries) and you get a cut. The cut heals. How do the new cel

ArbitrLikvidat [17]

Answer:

The new cells are the same as the previous ones, since they are the result of the mitosis process.

Explanation:

When we cut our skin, our brain sends information to millions of cells to take action and prevent this cut from putting us in danger. At that moment, the blood cells begin their work, supplying enough oxygen to stop possible bleeding and start the healing process. Then another group of cells swap out possible bacteria that may be trying to get into the wound. Last but not least, skin cells enter cell division and undergo mitosis, to generate new cells and create a new skin layer.

New cells are the same as old cells, as they are the result of mitosis. Mitosis is the process of cell division where one cell gives rise to two cells exactly the same as it.

3 0

3 years ago

Which of the following does NOT characterize proteins?

8090 [49]

Answer:

The answer is C) They appear to be the molecular carriers of coded hereditary information.

Explanation:

Why NOT C) They appear to be the molecular carriers of coded hereditary information?

This is the job of the nucleic acids. It is composed of nucleotides which are the basic units of DNA and RNA. They carry genetic information about a certain organism.

<h3 /><h3>True of proteins:</h3>

A) They may be denatured or coagulated by heat or acidity.

Denaturation is the destruction of the protein's secondary and/or tertiary structures. The primary structure is not disrupted due to the tough peptide bonds and can only be broken down by acid. For heat denaturation, hydrogen bonds are destroyed, as in cooking of egg whites and medical equipment sterilization.

B) They have both functional and structural roles in the body.

There are many kinds of proteins that have functional and structural roles like hormones (FSH, LH), antibodies (IgA, IgM), enzymes (lipase, amylase), for storage/transport (hemoglobin, ferritin), and locomotion (actin, troponin).

D) Their function depends on their three-dimensional shape.

Just like hemoglobin, it's quaternary structure can carry 4 molecules of iron in one go. Enzymes are shaped accordingly to fit a specific substrate (lock-and-key model)

6 0

3 years ago

What might happen if the gametes of a species had

mario62 [17]

Answer:

The chromosome number will not be constant and the person would die.

Explanation:

During gamete formation, half of the chromosomes arise from one parent and the other half from the other parent. This is possible due to the process of meiosis.

If during gamete formation, the number of chromosome does not get reduced, then after fertilization the gamete will have double the number of chromosomes as compared to the parents. Hence, the chromosome number of the person will not remain constant and he/she would die.

3 0

3 years ago