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3 years ago

Which have three processes are methods of gene recombination?

Biology

2 answers:

Ivenika [448]3 years ago

8 0

The answer is b) crossing over, independent assortment, and fertilization.

tresset_1 [31]3 years ago

7 0

A seems most logical

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SCIENCEEEEEEEEE Frieda makes a pyramid of oranges for a display at the grocery store. A few minutes later, Corwin bumps into the

mihalych1998 [28]

The correct answer is A. Melting

Explanation:

Melting occurs in solids as these change their state to liquid state, usually due to high temperatures. For example, if one cube of ice is exposed to heat it melts. This physical change implies the solid loss its defined shape and particles in it are not as organized as before.

This process is exemplified by the situation of the oranges because the pyramid of oranges had a defined shape and the oranges were arranged in a defined pattern; however, in the end, this shape changes, and the particles (oranges) are no longer organized in a strict pattern. Also, the distance between particles increases, which also happens when solids become liquids.

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3 years ago

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An ion with a positive charge has what electrons?

andreev551 [17]

Answer: Negative Charge

Explanation:because when you have a positive charge to electrons then you will get a negative charge

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3 years ago

Tissues combine to form _____. A. cells B. organs C. an organ system D. an organism

xxMikexx [17]

B tissues combine to form an organ

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3 years ago

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In discriminating between a viable and non-viable early intrauterine pregnancy, which one of the following criteria can be used

Alecsey [184]

Answer:

The correct answer in discriminating between a viable and non-viable early intrauterine pregnancy is B: "Mean gestational sac diameter of > 25 mm and no embryo".

Explanation:

There are different criteria used to discriminate between a viable and a non-viable early intrauterine pregnancy. The most often used to diagnose pregnancy failure are:

- Crown-rump length criterion: This is the absence of cardiac activity by the time the embryo has reached crown-rump length. A crown-rump length of 7 mm or more with no cardiac activity has been suggested by the latest studies to diagnose a non-viable pregnancy. There is a substantial likelihood that a crown-rump length < 7 mm can result in a false-positive diagnosis of pregnancy failure.

- Mean sac diameter criterion: This is the absence of embryo by the time the gestational sac has grown to a certain size. The gestational sac increases as the pregnancy progress. It has been suggested by the latest studies to use a mean sac diameter of 25 mm or more, and no visible embryo to diagnose failed pregnancy. A mean sac diameter of 16 to 24 mm and no embryo is suspicious for failed pregnancy, but shouldn’t be used to diagnose it.

- Time-based criteria: This is the absence of an embryo by a certain point in time. If an initial sonogram shows that there is a gestational sac and a yolk sac, but about 11 days later there isn’t any embryo with cardiac activity, then a failed pregnancy can be established. The timing event in early pregnancy is precise and reproducible to perform a correct diagnosis.

There are also suspicious findings that may help to identify a non-viable pregnancy. These are not certain and have not been extensively studied yet, so they cannot be used to reliably diagnose a pregnancy failure. A few of these findings are an empty amnion, a small gestational sac size, and the yolk sac size.

- Yolk sac: An enlarged yolk sac sized over 7 mm is suspicious for a failed pregnancy.

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3 years ago

10. What are the main functions of a protein?

vampirchik [111]

Answer: regulate body processes, transport materials throughout your body, help your immune system and act as a source of energy.

Explanation:

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3 years ago

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