If you found a human skeleton that you believe is approximately 20,000 years old, which radioisotope would you use to date it?

Biology

1 answer:

dusya [7]3 years ago

3 0

14C (carbon-14) can be used to date a 20,000 year old skeleton

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The primary storage site for sperm is the seminal vesicles. a. True b. False

lesya692 [45]

Answer:

The correct answer is option B. false.

Explanation:

The seminal vesicles are the site of production of the seminal fluid which makes 60 % of the total seminal vesicles. The seminal vesicles do not store the sperm.

The primary storage site of the sperm in seminiferous tubules and tubular storage sites for the sperm is epididymis.

Thus, the correct answer is option B. false.

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Why is the proton pump important to animal cells?

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Answer:Transport of the positively charged proton is typically electrogenic, i.e. it generates an electrical field across the membrane also called the membrane potential. ... In cell respiration, the proton pump uses energy to transport protons from the matrix of the mitochondrion to the inter-membrane space.

Explanation:

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Which statements describe a seismograph? Check all that apply.

Readme [11.4K]

Answer:

Explanation:

Because it's giving a brief description of how it looks and what it's function is, which as listed a seismograph is used to record ground motion such as caused by earthquakes, volcanic eruptions and explosions.

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finlep [7]

[Ar] 4s1 is the correct answer

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4 years ago

One of your brother's friends, Dylan, is unusually short with a stocky build; has a flat face, a large tongue, and an extra fold

Oksanka [162]

Answer:

Dylan likely has Down Syndrome / 21 Trisomy Syndrome.

Explanation:

Down Syndrome is a genetic disorder in which the person has an extra copy of chromosome 21, this is why the disorder is known as Trisomy 21. This extra copy changes how the body and the brain develope, which can cause mental and physical problems.

Children with this disorder usually have a low intellectual level, the most frequent cause of identifying mental delay of genetic origin.

Some of the characteristics of these children are slight diminution in the skull size, almond-shaped eyes, a short neck, small ears, a small mouth, a large tongue tends to get out of the mouth, narrow auditive conduct, tiny hands, and feet, weak muscular tone, and they are usually short in height.

There are also some medical problems such as hearing loss, apnea, ear infections, ocular problems, heart defects, intestinal malformations, hypothyroidism, hip dislocation, anemia, among others.

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