Unicellular organisms excrete waste by _____.

Answers

Answer 1

Answer: Unicellular organisms excrete waste by a contractile vacuole. A vacuole is membrane-enveloped organelle in a cell that is found in lots of microorganism. It expands, filling with water then contracts, removing all of its contents to the exterior of the cell.

Answer 2

Answer:

all of the above i passed the test

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please help me If a heterozygous dominant tall pea plant is crossed with a short pea plant, what is the expected phenotypic ratio of tall:short plants? 1:1 1:2 3:1 all tall all short

Answers

Assuming a diallelic gene exhibiting complete dominance, with tall plants being the dominant phenotype and short plants the recessive one, the cross of a heter0zyg0us plant with a short one results in a phenotypic ratio 1:1.

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We know that the cross involved a heter0zyg0us dominant tall pea plant and a short pea plant.

We will assume a diallelic gene coding for this trait, and exhibiting complete dominance. This means that the dominant allele completely masks the expression of the recessive allele.

So,

h0m0zyg0us dominant genotype ⇒ dominant phenotype

heter0zyg0us genotype ⇒ dominant phenotype

h0m0zygous recessive genotype ⇒ recessive phenotype

If the heter0zyg0us plant exhibits the dominant phenotype, it means that the allele coding for tall plants in the dominant allele.

So let us say that

T is the dominant allele that codes for tall plants

t is the recessive allele that codes for short plant

According to this information, the tall plant is Tt and the short plant is tt.

So let us make the cross,

Cross: tall plant with short plant

Parentals) Tt x tt

Gametes) T t t t

Punnett square) T t

t Tt tt

F1) Genotype

2/4 = 1/2 = 50% of the progeny is expected to be heter0zygous, Tt

2/4 = 1/2 = 50% of the progeny is expected to be h0m0zyg0us recessive, tt

Genotypic ratio ⇒ 1:1

Phenotype

2/4 = 1/2 = 50% of the progeny is expected to be tall plants

2/4 = 1/2 = 50% of the progeny is expected to be short plants

Phenotypic ratio ⇒ 1:1

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brainly.com/question/11552649?referrer=searchResults

dominant trait = T (tall)
recessive trait = t (short)

heterozygous, meaning different, tall pea plant = Tt
short, short being recessive, pea plant = tt

phenotype means physical looks, which is either tall or short

T t

t | Tt tt
t | Tt tt

two Tt & two tt meaning there are 2 tall and two short. therefore,
1:1

Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. What is the probability that a female child of Charles and Marie would suffer from hemophilia?a. 0 percent
b. 25 percent
c. 50 percent
d. 100 percent

Answers

Since hemophilia is an X-linked recessive disorder, the probability depends on the X alleles.
So, if father has dominant allele (H), the probability that a female child would suffer from hemophilia (genotype: hh) is 0%, no matter of mother's genotype:

Father Mother
Parents: H x Hh
Daughter: HH or Hh

Father Mother
Parents: H x HH
Daughter: HH

Father Mother
Parents: H x hh
Daughter: Hh or Hh

But, if the father has recessive allele, the probability that a female child would suffer from hemophilia (genotype: hh) will depend on mother's genotype.
If mother is dominant homozygous, there will be 0% of possibility:
Father Mother
Parents: h x HH
Daughter: Hh

If mother is recessive homozygous, the possibility is 100%:
Father Mother
Parents: h x hh
Daughter: hh

If mother is heterozygous, the possibility is 50%:
Father Mother
Parents: h x Hh
Daughter: Hh or hh

Answer:

It's 0%

Explanation:

It's 0%

Vascular plants consist of about _____ of all living plant species.a. 50%b. 65%
c. 95%
d. 25%

Answers

b. 65%

In terms of vascular plants, they help maintain the water cycle. The property of these plants enables them to carry out this function is their well-developed vascular system. These type of plants are more evolved and developed than nonvascular plants because of its specialized characteristics like xylem, which is a tissue that is responsible for its framework and not only that, it is also has a greater mechanism for water transference. Another is phloem, which is responsible for food conduction.

correct answer is 95%

Which term best describes the change from more light-colored moths to more dark-colored moth

Answers

The answer is industrial melanism.

During the Industrial revolution, due to pollution, trees become darker in the urban area. Light-colored moths were, thus, easy prey. The dark-colored moths were able to camouflage on dark trees and avoid predators. The phenomenon is known as industrial melanism. So, in polluted urban areas, the number of dark-colored peppered moths increased. In the clean environment, were much effective in hiding from predators and they outnumbered the dark-colored moths.

Answer: acquired

Explanation:

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