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jeka94
3 years ago
9

Why are concentration gradients important to cells

Biology
1 answer:
Pepsi [2]3 years ago
5 0


A concentration gradient is the process of particles or solutes moving through a solution from areas of  greater particle concentration to areas of low particle concentration.

The importance of a concentration gradient is that it is what makes osmosis and diffusion to happen. If there were no gradient, there would be no movement of anything from high to low concentrations.  Because  cells are either hypertonic or hypotonic, nutrients and materials are able to flow either in or out of the cell and life is sustained. If all cells were isotonic, then there would be no flow of nutrients and materials and cells would not survive.  


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Sickle cell anaemia is an inherited autosomal recessive
alekssr [168]

Answer:

1/8 (12.5%)

Explanation:

An autosomal recessive disease is an inherited disease in which an individual need to receive both defective alleles at the same gene <em>locus</em> to be expressed in the phenotype. In this case, both parents are carriers of the recessive mutant allele associated with the sickle cell anaemia trait, thereby both parents are heterozygous, ie., each parent has one copy of the normal allele 'H' and one copy of the defective mutant allele 'h' associated with this condition. In consequence, their first child has a 1/4 (25%) chance of having sickle-cell anaemia. Moreover, the chance of having a girl is 1/2 and the chance of having a boy is 1/2, thereby the final chance of having a girl sickle cell anaemia individual is 1/4 x 1/2 = 1/8 (12.5%).

- Parental cross for sickle cell anaemia trait = Hh x Hh >>

- F1 = 1/4 HH (normal); 1/2 Hh (normal); 1/4 hh (sickle cell anaemia) >>  

- Sex proportion of sickle cell anaemia individuals =  1/8 female sickle cell anaemia individuals + 1/8 male sickle cell anaemia individuals (1/8 + 1/8 = 1/4)

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3 years ago
Which structure could limits water loss in plants?
lozanna [386]

Answer:

Big leaves cause water loss

7 0
3 years ago
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julsineya [31]

They show all or part of earth.

<u>Explanation:</u>

Maps are the pictorial representation of earth. The people who draw maps are called cartographers and the maps are represented usually as 2D images.  A map of earth gives an idea about the differences in sizes of the countries of the world and various geographical features.

A map usually uses a scale which gives an idea about the relationship between distances on the map and actual distance on earth. Scales can be of different types like verbal scale, representative fraction, graphic scale etc.

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3 years ago
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Arlecino [84]

Answer:

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Subsistence Growth: Arithmetic

Explanation:

Thomas Malthus was kind of a pessimist. His theory says basically we will run out of food and die. People grow like this equation: 2^x while food grows like this equation: 2x. So if you understand that it explains it.

PS: is this a biology question??? i remember learning this in AP Human Geography

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2 years ago
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Radda [10]

Answer:

B, and C

Explanation:

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3 years ago
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