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Norma-Jean [14]
3 years ago
11

An organic substance that promotes chemical change without being used up in the reaction itself ​

Biology
1 answer:
Ksenya-84 [330]3 years ago
4 0

catalyst

Explanation:

catalyst promote chemical reaction without being used up in the reaction

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The ABO blood groups in humans are expressed as the I A , I B , and i alleles. The I A allele encodes the A blood group antigen,
Fynjy0 [20]

Answer:

d. multiple alleles and codominance

Explanation:

ABO blood group is controlled by three alleles instead of the usual two. Hence, it is an example of multiple alleles. These three alleles are IA, IB and i. IAIA genotype leads to production of A antigen hence A blood group. IBIB genotype leads to production of B antigen hence B blood group. When they are present together (IAIB) both A and B antigens are produced resulting in AB blood group. Hence ABO blood group is also an example of codominance.

Both IA and IB are dominant over the i allele. So IAi and IBi will produce A and B blood group respectively. ii genotype leads to O genotype.

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Sarah sets aside time every night to read some pages in her history book. She schedules a break into her study time. Why is this
Luba_88 [7]
The task is not realistic for the time she has set aside.
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AnnZ [28]

Answer:

Red Blood Cell lacks a nucleus, it would be unable to carry oxygen efficiently.

Explanation:

The absence of a nucleus is an adaptation of the red blood cell for its role. This allows the red blood cell to contain more hemoglobin and, therefore, carry more oxygen molecules. It also allows the cell to have its own distinctive bivalve shape, which promotes diffusion.

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2. Some members of the phylum________havea shell Inside their body as in octopus squids and cuttlefish.​
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Explanation:

...... .. . . .

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