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Alex73 [517]
2 years ago
7

Genetic variations in a population are caused by random

Biology
2 answers:
bonufazy [111]2 years ago
8 0

Answer:

Mutations

Explanation:

KengaRu [80]2 years ago
5 0

Answer:

Mutations

Explanation:

I took a quiz:)

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Ionic compounds form ions in water.<br> True?<br> False?
krok68 [10]

Answer:

True

Explanation:

For example, NaCl - sodium chloride, when  dissolved in water forms Na+ and Cl- ions.

4 0
3 years ago
What is an example of a chromosomal nondisjunction that occurs during the first division?
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Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division. There are three forms of nondisjunction: failure of a pair of homologous chromosomes to separate in meiosis I, failure of sister chromatids to separate during meiosis II, and failure of sister chromatids to separate during mitosis.[1][2][3] Nondisjunction results in daughter cells with abnormal chromosome numbers (aneuploidy).

Calvin Bridges and Thomas Hunt Morgan are credited with discovering nondisjunction in Drosophila melanogaster sex chromosomes in the spring of 1910, while working in the Zoological Laboratory of Columbia University.[4]

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3 years ago
Why SA node called pacemaker of heart
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SA Node<span> which is also known as the sinus node, is the natural pacemaker of the heart. It controls the heart rate by generating electrical impulses and then sending electrical signals through the heart muscle, causing the heart to contract and pump blood throughout the body. </span>

The SA Node is located in the outer layer of the right atrium of the heart, near the superior vena cava. It is made up of a group of cells (myocytes) positioned on the wall of the right atrium, at the center of the heart and near the entrance of the superior vena cava. These cells contract at a rate of about 70-80 times per minute, which make up the natural heart beat.



3 0
2 years ago
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Which of these is an example of how bacteria are beneficial?
elena-s [515]
B. bacteria has a negative image in our world.... people forget that there is good bacteria in the body that helps break down callulose in some animals' digestive system and helps to fight infectious diseases
6 0
3 years ago
In which type of injection are medications administered directly into the bloodstream?
olya-2409 [2.1K]
Parenteral route

injecting a drug into the body, includes intradermal, SQ, IM, IV routes. Drugs given IV route produce the most rapid actions because they are given directly into the bloodstream.

5 0
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