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julsineya [31]
3 years ago
11

Which group evolved first historically?" Osteichthyes or Chondrichthyes

Biology
1 answer:
Kaylis [27]3 years ago
6 0

Answer:

Neither evolution is not real.

Explanation:

God created everything on earth in space and everything beyond what we can see feel or hear.

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Pls answer its due soon!!!
pickupchik [31]

Explanation:

Meiosis makes genetic variety possible. It makes sperm & egg cells called gametes. Each gamete has 23 chromosomes. To make a diploid cell two gametes (sperm & cell) come together.

During prophase 1 the chromosomes pair up with their homologous pairs so they can transfer their genetic information and exchange it between each other. It makes recombinant chromosomes that influence the genetic diversity between the same people.

Now they are in metaphase 1, the chromosomes are in pairs in the middle of the cell. In anaphase 1, the chromosomes are pulled away by the spindle fibers. Then in telophase 1, there are two formed nuclei. Cytokinesis 1 then splits the cytoplasm.

Now they are in meiosis 2. During prophase 2, there are chromosomes and the spindles are starting to form again without crossing over like in prophase 1. In metaphase 2, chromosomes are going to line up in the middle in both cells unlike during metaphase 1 where the chromosomes were only in pairs.  In anaphase 2, only the chromatids are being pulled away by the spindle fibers. Next in telophase 2 the nuclei reform and the 2 cells are each going to divide into 4 cells. Finally, cytokinesis completely splits the cytoplasm.

Keeping in mind that each sex only produces one type of gamete cell (sperm or eggs), and of the independent assortment and crossing over of chromosomes, the end result will be diversity.

5 0
3 years ago
PLZZZZ HELPPP!!<br> During vaporization, a substance changes from a liquid to a.....what?
Svetach [21]

During evaporation the sun heats a large body of water causing water vapor. What vapor is a gas. Evaporation is also apart of the water cycle, which evaporation in an important tool in the water cycle.


Remember this:

- When water is heated it turns into a gas.

-When water gets to 0°c water freezes.

-When ice is heated, it turns into a liquid.

4 0
3 years ago
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According to the World Resource Institute, biodiversity is the variety of the world's organisms, including their genetic diversi
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Seed banks are expensive to maintain.
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Answer:

IgM

Explanation:

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