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creativ13 [48]
3 years ago
9

!!!!!WILL MARK BRAINLIEST!!!!!

Biology
1 answer:
zhuklara [117]3 years ago
5 0

Answer:

I had to do this because your answer choices was wrong

Polyploidy increases the rate of speciation by having different numbers of chromosomes so organisms cannot reproduce with each other. The rate of speciation is mostly rapid 38 thinks that it mark me brainlest because I was first :D

Explanation:

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a man is twice as old as his son.Five years ago the ratio of their ages was 9:4.Find the sum of their ages​
elena-s [515]

Answer:

75years

Explanation:

Let the Father's age be represented by 2x

Let the Son's age be represented by x

Five years ago;

Man's age will be = 2x - 5

Son's age will be = x - 5

If the ratio of their ages five years ago was 9:4, then;

2x - 5/x-5 = 9/4

4(2x - 5) = 9(x - 5)

8x - 20 = 9x - 45

- Collect like terms

-20 + 45 = 9x - 8x

25 = x

Hence, the son's age = 25 years

If x = 25, the father's age (2x) will be 2 × 25 = 50years

The sum of their ages will be = 25years + 50years = 75years

6 0
3 years ago
Tendon sheaths ________. Tendon sheaths ________. are lined with dense irregular connective tissue help anchor the tendon to the
leonid [27]

Answer:

Tendon sheaths <u>act as friction-reducing structures.</u>

Explanation:

Tendon sheaths are fibrous tissue that is around tendons to protect and make the movements of these smoother. For example, they reduce the friction of the flexors and extensors tendons of the hand. These are tendons that we constantly use to open and close our hands when we want to grab objects. Without the sheath, the tendons will not move easily, and due to the excessive use, there can be inflammation.

The sheats have two layers, one internal, which is a synovial one that produces synovial fluid to lubricate the tendon, and the external, which is a fibrous layer.

4 0
3 years ago
R_______ is the process in which some animals can regenerate parts of the body and d the reproduction of new cells is acheived b
Anit [1.1K]

Reproduction I think sorry if that is wrong

8 0
3 years ago
Which student’s measurement is more accurate? Why?
Anastaziya [24]

Answer:

Student B

Explanation:

They used to units of measurement to verify there answer.

Fist student rounded so its an estimate of the answer but second student verified with millimetes and cm.

Also its physics lol or maybe math.

8 0
2 years ago
Read 2 more answers
When a peptide hormone reaches its target cell, which event happens next?
Anestetic [448]
<span>It binds itself to the receptors present on the surface of the cell membrane, which activates the enzymes present inside cell. Then It passes through the cell membrane and attaches itself to a receptor protein present in the cytoplasm. It passes on the signal to the secondary messengers inside the cell, which activate the receptors on the cell membrane.</span>
3 0
3 years ago
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