Most stars end their lives as which type of star? A. giant
B. white dwarf
C. neutron
D. main sequence

Answers

Answer 1

Answer: a white dwarf is the answer

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When exposed to bright sunlight, some people involuntarily sneeze. This reaction is known as a photic response. It is controlled by a single gene with two alleles, H and h. A man and a woman who sneeze when exposed to bright sunlight are both heterozygous for the photic response trait. Draw a Punnett Square using the allele symbols H and h to show the expected genotypes of the man and woman’s biological children. Identify all possible phenotypes of the offspring and their expected percentages.

A hydrocarbon has molecular formula C3H8. Identify the class of hydrocarbons it belongs to.

Answers

Answer:

Alkanes

Explanation:

There are 3 classes of hydrocarbons based on the on the presence of single, double and triple bond present in them. These classes are mentioned as under:

1) alkanes

2)alkenes

3)alkynes

Alkanes are the hydrocarbons which are compounds of carbon and hydrogen bonded by single bond. Their general formula is CnH2n+2 that means if in an alkane n = 3 then it will have 3 carbon and 2n+2 = 8 hydrogen molecules.

Alkenes are the hydrocarbons which are compounds of carbon and hydrogen bonded by double bond. Their general formula is CnH2n.

Alkynes are the hydrocarbons which are compounds of carbon and hydrogen bonded by triple bond. Their general formula is CnH2n-2.

As explained above, the given hydrocarbon is an alkane because its chemical formula is C3H8 which satisfies the condition for formula CnH2n+2 which is valid for alkanes.

It would belong to the group known as the Alkane which have the general form $C_(n) H_(2n + 2)$

Use the models that you created in Lesson 2, Lab 1 to help you answer the following question. Compare the surface area to volume ratio of a large cell to that of a small cell.

Why does the ratio of surface area to volume increase with the decrease in cell size?

A. A larger cell has more surface area than volume.
B. A smaller cell has more surface area than volume.
C. A smaller cell has more volume than surface area.
D. A smaller cell has an equal ratio of surface area to volume

Answers

Answer:

Explanation:

This is a question more about understanding ratios than understanding cells.

A surface area to volume ratio (S/V) in a size-decreasing cell would increase due to a more significant loss in volume that in surface area. In reality, both decrease (surface area AND volume), but as we are talking about a ratio, this one would go up due to a more dramatic decrease in volume.

B. A smaller cell has more surface area than volume. This allows for more reactions to occur across the various membranes of the cell.

Explain why it is important
for you to be scientifically
literate

Answers

Answer:

C. Explain to your reader thorougly

Explanation:

scientific litierate

This reproductive structure can be considered an advancement over spores. It protects the embryo from injury and drying out. It also provides food for the embryo. This plant structure is aa. leaf.
b. seed.
c. cone.
d. flower.

Answers

I believe it is seed however i could be wrong.

The answer is B- Seed.

Punnett square are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. A pansy that is homozygous for purple flowers (PP) is crossed with a pansy that is homozygous for pink flowers (pp). Which genotypes will be included for the offspring in the Punnett square for this cross?

Answers

Answer:

The correct answer would be Pp.

The genotype of one parent is PP. Thus, it will produce only one type of allele, that is, P.

Similarly, the genotype of another parent is pp. Thus, it will produce only one type of gamete, that is, p.

The cross would produce offspring with only one type of genotype, that is, heterozygous Pp.

The phenotype of all the offspring will be purple as it is a dominant trait.

When we cross PP x pp we obtain:

Pp + Pp + Pp + Pp (we obtain four identical genotype).

Pp (heterozygote flower) is the Only genotype when we cross two different homozygotes.

The phenotype will be the purple flower since it is the dominant genotype.

Which of the following best describes the interaction between Earth’s crust and living organisms?a.Raw materials essential for life are cycled through Earth’s crust.
b.Fossil fuels are a valuable energy source for the biosphere.
c.The continental crust allowed the evolution of life on land.
d.The crust recycles the organic materials in sedimentary rock.

Answers

The best answer is A. Raw materials which are essential for life are cycled through the Earth's crust. The crust is the uppermost layer of the Earth. In this layer many types of rocks are found. The crust is the also coined as the home of life since it has its own systems of mineral recycling which is essential for life here on earth.

Answer:

The answer is A

Explanation:

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