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nikdorinn [45]
3 years ago
11

Life comes from the -Water -Land WHICH PLEASE HELP?

Biology
2 answers:
Galina-37 [17]3 years ago
6 0
Land it comes from the land
Delvig [45]3 years ago
4 0

Answer:

water

Explanation:

I'm pretty sure life originated from water if that's what your question is.

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The measured distance between genes D and E in a two point test cross is 50 map units. What could this mean in physical terms
balu736 [363]

Answer:

Genes that express 50% of recombination frequency or more are not linked genes. They might be in different chromosomes or located in the same one, but too far from each other.    

Explanation:

Genes are physically located in chromosomes. Many genes segregate independently after crossing-over because they are located far away from each other. But some other genes are too close, and they do not segregate independently. These are the linked genes that do not exhibit an independent distribution, and they inherit together more frequently.

We need to know that 1% of recombination frequency = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.

When the recombination frequency is inferior to 50%, genes are linked. If it is equal or superior, they are not linked. Genes are located far enough from each other to assort independently.

Genes that express 50% of recombination frequency or more are not linked genes. They might be in different chromosomes or located in the same one, but too far from each other.

8 0
3 years ago
A scientist was observing an unknown slide under an electron microsocope; he found a cell without a well-defined nucleus but wit
NeTakaya
<span>Eukaryotic cell

There are differences between Eukaryotic and Prokaryotic cells. This difference is considered to be the most important distinction between groups of organisms. A Prokaryotic cell does not contain a nucleus. It only contains one chromosome and is a single-celled organism. It was the only form of life on earth for millions of years. Examples of a Prokaryotic cell are the different types of bacteria present today. 
A Eukaryotic cell contains a nucleus; more than one chromosome and is typically a multi-celled organism.  Both plant and animal cells are eukaryotic cells.</span>
5 0
3 years ago
Calculate the surface-to-volume ratio of a spherical cell 15mum in diameter and of a cell 2mum in diameter. What are the consequ
Marina CMI [18]

Answer:

For calculating the surface to volume ratio for a spherical cell,  

Surface area (S) = 4πr²

Volume (V) = 4πr³ / 3

Ratio = S / V = 4πr² / 4πr³ / 3 = 3 × 4πr² / 4πr³

= 3/r

1. 15 micrometer diameter = Ratio = 3/7.5 = 0.4

2. 2 micrometer diameter = Ratio = 3/1 = 3

The cells exhibiting high surface to volume ratio shows enhanced metabolic activity. Shows easy uptake of oxygen, nutrients, water, and also the excretion of waste as they possess large surface.  

8 0
3 years ago
Which of these is NOT something that you need to include in your lab report?
Alexeev081 [22]

Answer:

<h3><em>D </em>seems less important so I’m guessing it’s, D</h3>

Explanation:

3 0
3 years ago
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You are on standby at a sporting event when an infant nearby suddenly begins to cough
fiasKO [112]
<span>When you are on standby and it happens that a nearby infant suddenly begins to cough, you need to give your attention to the infant just to check the infants’ condition.  If you have the medical knowledge, you can assess the infant by checking if there is an obstruction to his/her mouth and if it is conscious. Then, you can give sets of 5 back slaps and 5 chest thrusts to remove the object.</span>
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