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valina [46]
3 years ago
5

Question 14 Answer correctly plz.

Biology
2 answers:
kramer3 years ago
7 0

Answer:

1 is C

2 is B

3 is A

Explanation:

Oliga [24]3 years ago
3 0
C. The structure splits into two opposite stems
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The first cells to initiate an electrical signal in the heart is the
Lady_Fox [76]

Answer:

Answer is Sinoatrial node, SA.

Explanation:

The sinoatrial node, SA, is known to be a group of cells which are found at the top of the heart.

The electrical signal that is initiated by the sinoatrial node bring about or stimulates the atria and then the ventricle of the heart.

It should be noted that, the sinoatrial node are regarded as the pacemaker cells.

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What is the energy input in the process shown in the model? A. Electrical energy from hydrogen ions
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I AM SURE C IS THE ANSWER
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3 years ago
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The bone marrow of the skeletal system produces lymphocytes which belong to what system ​
Fynjy0 [20]

Answer: Immune system

Explanation:

Lymphocytes are a class of white blood cells (leukocytes) involved in immune response when activated by the a foreign molecule (an antigen). B lymphocytes develop in the bone marrow of mammals and are responsible for the production of circulating antibodies.

Thus, lymphocytes are associated with the immune system.

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3 years ago
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A lab technician is preparing agar medium. The medium requires 21 grams (g) of
docker41 [41]

Answer:

21.81grams

Explanation:

According to the question, an agar medium requires the following ingredients: 21 grams (g) of

agar, 500 mg of dextrose, 3 dg of sodium, and 1 cg of potassium per 1,000 milliliters (mL) of distilled water.

Hence, the dry ingredient contain 21grams (g) of agar, 500milligrams (mg) of dextrose, 3decigrams (dg) of Sodium, and 1centigrams (cg) of pottasium.

We need to convert all units (not in grams (g)) to grams.

1grams = 1000milligrams

500 milligrams = 500/1000

= 0.500grams.

1grams = 10decigrams

3decigrams = 3/10

= 0.3grams

1grams = 100centigrams

1centigrams = 1/100

= 0.01 grams

Therefore, we have 21g, 0.500g, 0.3g, and 0.01g

The total dry weight of the ingredients will be:

21 + 0.500 + 0.3 + 0.01

= 21.81grams

3 0
3 years ago
What proportion of gametes produced by an individual with the genotype aaBbCc will have two or more beneficial alleles, if benef
olchik [2.2K]

Answer:

B) 0.25

Explanation:

In the given individual, the genotype is aaBbCc. This indicates that the individual has two pairs of contrasting alleles. Thus it will produce four different types of gametes, abc, aBC, aBc and abC will be formed. Out of 4 types of gametes only one gamete namely, aBC is with two beneficial alleles. Thus, the proportion of two or more beneficial alleles is 0.25 (1 out of 4).

8 0
3 years ago
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