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lorasvet [3.4K]
3 years ago
9

What are animals ribs made from

Biology
2 answers:
nikklg [1K]3 years ago
4 0
I believe they are made of the same thing our ribs are made of Bones
natta225 [31]3 years ago
4 0
Bones are calcium build up
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Match the steps in the cell cycle in the correct order
Tcecarenko [31]

Answer:

1. Chromosomes line up - metaphase

2. Cell growth - G1

3. Final preparations for division - G2

4. Chromosomes get pulled apart - anaphase

5. DNA replication - S

6. Chromosomes condense - prophase

7. Chromosomes uncoil and nucleus reforms - telophase

8. The cytoplasm and organelles divide, and now there are two identical cells - cytokinesis

Explanation:

There are four primary phases, or stages, in the cell cycle, which is a systematic process. Each stage has a goal that has to be achieved before moving on to the next. G1, S, G2, and mitosis are the stages.
There is growth during the G1 phase. A lot of protein is produced and water is pumped in, increasing the volume of the cell. The DNA is also examined at this time to see whether there has been any damage. The G1 phase precedes the S phase, therefore before going into S phase, the cell must make sure it has enough energy reserves.

The cell duplicates its DNA during the synthesis phase, also known as the S phase. DNA content doubles due to the duplication of all chromosomes. The compact state of DNA is created by proteins, which do not exist in and of themselves. Therefore, in order to ensure that the new DNA is properly packed when DNA is replicated, new packaging proteins must be produced. Histones are the proteins that house DNA. The production of new DNA is closely linked to the production of new histones.

A cell multiplies its organelles during the G2 phase. Right before the cells divide into two distinct cells during mitosis, the G2 phase occurs. There must be distinct functioning organelles in each daughter cell. Organelles like the golgi and endoplasmic reticulum are linked networks of sizable membrane pouches that may change size. Other organelles, including mitochondria and chloroplasts, are separate structures that must separate similarly to how cells do.

The process of physically dividing a cell into two daughter cells is called mitosis. Prophase, metaphase, anaphase, and telophase are its four basic stages. The nuclear membrane deteriorates as the chromosomes thicken during prophase. The center of the cell's chromosomes align during metaphase. One chromosome splits in half during anaphase, sending one half to either side. The telophase is characterized by the pinching together of the cell's centre to form two separate cells.

6 0
2 years ago
Select the correct answer. In nature, which pigment gives red algae its color? A. Phycoerythrin B. Fucoxanthin C. Chlorophyll D.
Volgvan

Answer:

The Answer is A

Explanation:

phycoerythrin is the pigment that gives red algae its color.

5 0
2 years ago
The cell theory was constructed by _____.
Trava [24]
The cell theory was constructed by <span>Schleiden and Schwann.
</span>
>Matthias Jakob Schleiden<span>  was a German </span>botanist<span> and co-founder of the </span>cell theory, along with Theodor Schwann<span> and </span>Rudolf Virchow (not really credited towards it, he is a contributor to the said theory.
>Robert Hook---largely attributed the cell theory;started the study of cells known as the cell biology.
>Carolus Linnaeus---<span>a Swedish </span>botanist<span>, physician, and </span>zoologist<span>, who formalized the modern system of naming organisms called </span>binomial nomenclature<span>.</span>
7 0
3 years ago
Read 2 more answers
Plasma is about ________ percent of the composition of blood and carries cellular elements and other substance
svetoff [14.1K]

Answer is 55%.

Blood is fluid connective tissue that consists of two main components, plasma and formed element. Blood plasma is a clear extracellular fluid, which is a mixture of proteins, enzymes, nutrients, wastes, hormones and gases. Formed elements are made up of the blood cells (red blood cells and white blood cells) and platelets. All formed elements are cells except for the platelets, which are tiny fragments of bone marrow cells.

The formed elements can be separated from plasma by centrifuge. On separation of blood components, it is evident that formed elements make up 45% of total blood volume while the plasma makes up 55% of the total volume.


6 0
3 years ago
Read 2 more answers
What is the number of chromosomes in each human sperm cell or egg cell?
Maksim231197 [3]
I think it should be 24, for there are 48 chromosomes in each cell


4 0
3 years ago
Read 2 more answers
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