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Serga [27]
3 years ago
11

If twins are born and one is a boy and one is a girl, are they identical or fraternal siblings?

Biology
1 answer:
coldgirl [10]3 years ago
6 0
Both they willo still look a like

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What is the functional advantage of the alveolar walls being so thin?
Sati [7]
Alveolar walls are thin to enable the quick passage of oxygen in and out of the lungs. The lungs works hand-in-hand with the heart and also is responsible in converting blood that's de-oxygenated into an oxygenated blood that is usable by the organ systems of the body. The alveolar walls are also designed to have thin membranes so that it can expand and constrict quickly allowing us to breather properly.
4 0
3 years ago
Miller's classic experiment demonstrated that a discharge of sparks through a mixture of gases could result in the formation of
beks73 [17]

Answer:

The correct answer will be-gas absent in primordial atmosphere (oxygen).

Explanation:

The Miller experiment was performed in 1953 to show that organic molecules can be formed from the inorganic molecules in the conditions resembling the primordial atmosphere.

Same conditions were created to the unstable atmosphere like a mixture of gases which included- methane, sulfur dioxide and hydrogen but lacked oxygen as it was absent in the primordial atmosphere.

Thus, gas absent in the primordial atmosphere (oxygen) is the correct answer.

6 0
3 years ago
Immediate source of energy to organisms
Feliz [49]
Hi there!

For all organisms to survive, they start off with sunlight. That's the main and immediate source of energy to any organism(s).

Sunlight gives warmth and energy and light of course.

Hope this helps!
4 0
3 years ago
The x chromosome is found ________. the y chromosome is found ________. in both males and females; only in females only in males
elixir [45]

The answer is both in males and females; only in males. Males have one Y chromosome and one X chromosome, while females have two X chromosomes. In mammals, the Y chromosome controls a gene which is the SRY, which produces embryonic improvement as a male. The Y chromosomes of males and other mammals also contain other genes needed for normal sperm production.

8 0
3 years ago
Read 2 more answers
In a taxonomic system one of the three broad groups that all living things fall into​
Citrus2011 [14]

Answer:

The correct answer is - domain.

Explanation:

In a taxonomic system, all the organisms fall into three broad groups that comprise different kingdoms of the organisms. This group of taxa known as Domain and it is the broadest and most inclusive taxa of the taxonomic system. It includes three groups Archaea, bacteria and eukarya.

Archaea and bacteria were used to comprise in one group but due their differences archaea are divided into new group. These domains have all the organisms present on earth.

7 0
3 years ago
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