Where on earth is the only location that the sun can ever be directly overhead?

Biology

1 answer:

Elanso [62]2 years ago

4 0

Answer: the two tropics zones

Explanation:

Between the two tropics zones, which includes the equator, the Sun is directly overhead twice per year. Outside the tropic zones, whether to the south or north, the Sun is never directly overhead. Two other significant lines of latitude are the Arctic Circle (around the North Pole) and the Antarctic Circle (around the South Pole).

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What 2 elements is salt made out of

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Answer:

Sodium and chlorine

Explanation:

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Condensation often gathers in the bottom of agar slants. why is it important in this exercise to limit condensation on plates bu

vekshin1

<h2>Answer:</h2>

Because condensation on the slant effects the bacterial growth in the test tube.

<h3>Explanation:</h3>

When agar is solidify in the test tube tilted, it takes a shape of slide on one side of the tube which is known as slat.
Slant is used instead of petri dishes because they provide more surface area for growth.
Water in the slat can invade the test tube, making agar unstable and the bacterial growth on the slat will be affected by moisture in bottom of slant.
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It is observed that the human population keep increasing significantly and it began to increase noticeably around 10,000 years ago.The greatest factor of this increase is the rapid development of the agricultures in lands, as well as the domestication of animals. These are the reasons why population increases at that time.

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The fruit fly Drosophila melanogaster is an important model system for studying inheritance in animals and genetic control of an

Snezhnost [94]

Answer:

The correct answer is "strengths: inexpensive, easy to culture, short life cycle, large number of offspring; weaknesses: invertebrate model, some diseases such as immunological cannot be modelled, anatomical features are very different from humans"

Explanation:

The fruit fly <em>Drosophila melanogaster</em> is one of the most used animal model for genetic and biomedical studies. There are many advantages of using Drosophila as model, including that it is very inexpensive to handle, it is easy to culture, it has a short life cycle allowing to observe the changes in phenotype very quickly and its large number of offspring allows to include several repetitions per trait in a study. However, there are some weaknesses of using Drosophila to study human biology. First, obviously the fruit fly is very different from humans, it is an invertebrate and its anatomical features are very different, which makes impossible to model some disorders such as immunological diseases.

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What is the purpose of the hormone thyroxine, which is produced by the thyroid gland?

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