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patriot [66]
2 years ago
9

Robert Hooke was the first person to observe cells. He observed these cells in

Biology
1 answer:
saveliy_v [14]2 years ago
6 0

Robert Hooke was the first person to observe cells. He observed these cells in (a) a piece of cork.

I hope this helps!

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Normal blood cells slide easily through narrow blood vessels. In sickle cell disease many red blood cells change to a crescent s
natta225 [31]

Answer:

Explanation:

The method of reproduction in humans is sexual reproduction: a type of reproduction that occurs when new organisms are produced through the coming together of genetic information from two individuals of different sexes mostly a male and a female (egg cell and the sperm). The genetic information for making the blood cells; the red blood cells genes in particular exists on chromosomes in the nucleus of the sex cells (egg and sperm cell) also called the gametes. Basically, the DNA provides instructions for the production of mostly all of the body's needs.

The genes coding for the sickle cells which is the abnormal red cell is always inherited in the recessive form meaning both parent has to possess one copy each of the defective gene in their DNA. For humans to get one copy of a sickle cell gene and one copy normal gene; it means one of the parents gametes (be it male or female) contributed the defective chromosome and the other normal gene is contributed by the other parent  during copulation giving rise to an individual that is heterozygous for the trait

For example, the sperm cell with the defective gene fertilizes the egg cell that has the normal copy of the gene producing an heterozgous individual.

7 0
2 years ago
50. The flow chart below shows how a metamorphic rock can change into a
max2010maxim [7]

Answer:

The process that would be the correct label to replace the question mark in this question is:

B) Deposition

Explanation:

Deposition takes place after erosion of sedimentary rock.  At this stage, the eroded sedimentary rocks build up under high pressure heat, wind, ice, water, and other natural forces to originate the rock formation cycle once again.  Naturally, after deposition, the igneous rocks, which have then layered up sedimentary rocks to become metamorphic rocks.

5 0
3 years ago
Which one of the following is an example of a prokaryote
Temka [501]
<span>Prokaryotic organisms lack membrane bound nuclei as well as organelles. 
</span>
Examples

-bacteria
-algae
6 0
3 years ago
Read 2 more answers
Consider a breeder that mates two heterozygous black Staffordshire bull terriers over the course of three years. The dam eventua
Lilit [14]

Answer:

Different colour occur due to heterozygous nature.

Explanation:

Most of the puppies just like parents because the black colour gene or allele is dominant over other colour allele whereas other colour puppies also formed due to presence of heterozygous type of alleles. Other colour occurs due to appearance of recessive allele in the physique of the offspring or formation of hybrids occurs which causes colour other than black and white in the offspring. In the F1 generation all the offspring resembles to the male parent but after this generation some offspring resembles to male, some are hybrids and other resembles to female.

6 0
2 years ago
Part d - do all bacterial cells have the same structures? there are some structures that are common to all prokaryotic cells, an
Tasya [4]

do all bacterial cells have the same structures? no

4 0
3 years ago
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