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Aloiza [94]
2 years ago
10

Help please!! What usually causes some species to become extinct?

Biology
2 answers:
klasskru [66]2 years ago
4 0

Invasive species or environment

kari74 [83]2 years ago
4 0
Human eating them till they all gone
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1. Get a flashlight and switch it on.
Anna [14]

Answer:

Explanation:

1. The beam emitted travels along a straight path and it is divergent in nature. It has its radius increasing progressively as the distance away from the source of light increases.

2. It would be observed that the region where the bulb is positioned has denser light beam. This gets fainter towards the edges of the beam and away from the bulb.

8 0
3 years ago
What are the chromosomes called when they look like Xs​
Marina86 [1]

Answer:

I think you're referring to the Metaphase...

Explanation:

During Cell Division (or, rather before!) the DNA needs to be replicated. This normally is done by DNA Polymerase, and results in two identical double strands (the "Sister Chromatids".

These chromatids are held together at the Centromere, which will be the heart of the "X"-shape. After that the DNA is packed into Chromosomes by winding it around proteins called Histones. If I remember correctly there are 5 different Histones.

This "Zipping Up" makes the chromosomes more visible.

As the two sister chromatids are still connected, the result is the X-shaped Metaphase Chromosome....

6 0
3 years ago
Homozygous alleles are also called
Kruka [31]
Purebred is another word for homozygous
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3 years ago
The atomic number of krypton (Kr) is 36, and its mass number is 84. How many neutrons does it have?
noname [10]
I believe the Answer is B
3 0
2 years ago
Read 2 more answers
Write about 3 lab safety rules and why it is important to follow them.​
lara31 [8.8K]

Answer:

1.  Always put hair up at all time Because if you don't you can accidently burn your hair and you don't want to get chemicals on it.

2. Always Wear your goggles Because if you don't your eyes can start like burning if you get to close to a chemical and when you have your goggles on it won't burn at all.

3. Always wear gloves because if you don't your hands can get Irritated because you can touch sum with your bare hands and It will probably be something that can make your hand burn  

Ik I have a lot of burning things in there but Ik from experience lol

Explanation:

4 0
2 years ago
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