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almond37 [142]
3 years ago
5

What group of organisms is simplest, without nuclei?

Biology
2 answers:
marin [14]3 years ago
7 0
The correct answer is d.) protista
elena-s [515]3 years ago
3 0
I believe its D the answer


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Using a loan could help with the purchase of which of the following?
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Answer:

House

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Which of the following best describes the importance of similar amino acid sequencing of a protein in different organisms?
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The abbreviation for a sudden deficient supply of blood to the brain lasting a short time is
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The answer would be TIA

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4 0
2 years ago
In a dihybrid cross involving two autosomal traits on different chromosomes in which the parents are purebred for the opposite f
Simora [160]

Answer:

The question lacks options, the options are:

A) 1 out of 16

B) 3 out of 16

C) 6 out of 16

D) 9 out of 16

The answer is 1 out of 16

Explanation:

This is a DIHYBRID cross because it involves two different genes coding for distinct traits. One of the traits will be dominant while the other recessive. Hence, parents that are purebred for opposite forms of the trait means that one parent is homozygous dominant while the other is homozygous recessive. When these two parents cross, they produce F1 offsprings that all possess the dominant trait but heterozygous/hybrids.

When these hybrids are self-crossed, they produce four different combinations of gametes which when crossed using a punnet square will result in F2 offsprings with a 9:3:3:1 phenotypic ratio according to Mendel's observation.

9 represents offsprings that are dominant for both traits

The two 3's represents offsprings that are recessive for one trait and dominant for the other respectively.

1 represents offsprings that are homozygous recessive for both traits.

Hence, 1 out of 16 offsprings will be homozygous recessive for both traits.

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3 years ago
since the parasympathetic division causes the heart rate to ____________ and the sympathetic division causes the heart rate to _
Oduvanchick [21]

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since the parasympathetic divison causes the heart rate to decrease and the sympathetic divison causes the heart rate to increase this is an example of antagonistic innervation

Explanation:

7 0
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