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never [62]
2 years ago
15

What is still lacking in the hypothesis of an asteroid impact as the cause of the end-cretaceous mass extinction?

Biology
1 answer:
Doss [256]2 years ago
8 0

A convincing explanation of why some lineages survived while others vanished is still lacking in the hypothesis of an asteroid impact as the cause of the end-cretaceous mass extinction.

<h3>What is an asteroid?</h3>

One of the smaller planets in the inner Solar System is an asteroid. Asteroids are metallic or rocky bodies without an atmosphere, ranging in size from 1-meter pebbles to a dwarf planet with a diameter of over 1000 km.

The majority of the one million or more known asteroids are concentrated in the main asteroid belt, which is 2 to 4 AU from the Sun and between the orbits of Mars and Jupiter. The three categories of asteroids that are typically recognized are C-type, M-type, and S-type.

These were given their names and are frequently associated with, respectively, carbonaceous, metallic, and silicaceous compositions. The largest asteroid, Ceres, has a diameter of over 1,000 km (600 mi), making it a dwarf planet.

To learn more about an asteroid with the help of given link:

brainly.com/question/11996385

#SPJ4

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A karyotype is a picture of<br> A. a cell.<br> B. cytoplasm.<br> C. chromosomes.<br> D. organelles.
Romashka [77]
A karyotype is the apperance of chromosomes in the cells' nuclei. so it's C
4 0
3 years ago
Read 2 more answers
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
To convert from grams to moles, you should multiply by...?
koban [17]

Answer:

 If there is no subscript, it means there is only one atom of that element in the formula. Multiply the number of atoms of an element by its atomic mass. Do this for all the atoms and add the values together to get the number of grams per mole. This is your conversion factor.

Explanation:

6 0
3 years ago
I NEED HELP QUICK! I will give brainliest
Alinara [238K]
The mRNA is being made into a protein.
This is translation and it happens outside the nucleus, in ribosomes in the cytoplasm or the rough endoplasmic reticulum. So the answer is c.
Let me know if you have any questions
7 0
3 years ago
What side of the moon do we see first
Roman55 [17]

If we could magically look down on our solar system, we would see that the half of the Moon facing the Sun is always lit. But the lit side does not always face the Earth! As the Moon circles the Earth, the amount of the lit side we see changes.

hope this helps!

(:

8 0
4 years ago
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