BIOLOGY HIGH SCHOOL

Select all that apply. What is the difference between DNA and RNA?
a.) DNA is a protein and RNA is a nucleic acid.
b.) DNA uses deoxyribose and RNA uses ribose.
c.) DNA has adenine and RNA has thymine.
d.) DNA has thymine and RNA has uracil.

Answers

Answer 1
Answer: B and D are the best answers

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Why might a scientist repeat an experiment if he/she didn't make a mistake in the first one? An experiment should be repeated toA) increase income for increased work.
B) prove how good of a scientist you are.
C) double check your results.
D) show how smart you are.

Answers

Experiments are often replicated or repeated even when no obvious mistake was visible. This is to establish how variable results are. Statistically, multiple runs are used to determine the variance or standard deviation around the average value. The best answer for this is choice C, to double check results.

Answer:

C

Explanation:

What do two different neutral isotopes of the same element have in common?

Answers

The answer to this question is that two different neutral isotopes ofthe same element will have the same atomic number. This is due to themhaving the same number of protons, and it is these protons whichdetermine the atomic number. However, these istotopes will havedifferent masses due to a difference in the amount of neutrons.

Why would breeders want to introduce mutations into a population?Single line text.Short answers please

Answers

Answer:

Breeders can increase the genetic variation in a population by inducing mutations, which are the ultimate source of genetic variability

In peas, yellow seed color (Y) is dominant to green seed color (y). A homozygous green pea plant is crossed with a heterozygous yellow pea plant. What is the predicted phenotypic ratio of the offspring

Answers

Answer:

2: 2 or 1:1

Explanation:

It is given that the yellow seed color is dominant over green seed color. The genotype of homozygous green pea plant and heterozygous yellow pea plants are “yy” and “Yy” respectively.  

The following punnet table represents the cross between “yy” and “Yy”

y y

Y Yy Yy

y yy yy

The genotypic ration is 2Yy :2yy

Yy represents heterozygous yellow pea plant

yy represents homozygous green pea plant  

yellow pea plant : green pea plant is equal to 2: 2 or 1:1

Each offspring will receive one allele from each parent, so the cross will be Yy with yy, resulting in four possible offspring: Yy, Yy, yy, and yy. Since Y is dominant to y, there will be two yellow for every four offspring or the ratio of 1/2 (Look up Punnet squares to understand this concept better)

A mature gymnosperm will possess all of the following EXCEPTA. seeds
B. leaves
C. flowers
D. vascular tissue
E. woody growth

Answers

A gymnosperm is a seed plant that produces naked seeds

A gymnosperm will have everything BUT flowers, Gymnosperms are tree like so they have woody growth, they produce seeds with pollen, they have leaves like most vascular plants, and since they are vascular they have vascular tissue, they have all of that except a fruit protecting the outside of the seed.

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Double fertilization results in the formation of select one:a. two diploid embryos and a haploid endosperm.
b. one diploid embryo and a triploid endosperm.
c. two diploid embryos.
d. one diploid embryo and a diploid endosperm.
e. two diploid embryos and a diploid seed coat.

Answers

Double fertilization results in the formation of  one diploid embryo and a triploid endosperm. Double fertilization is characterized by the formation of two embryos; the embryo proper which is diploid and the fusion product of the central cell with one male gamete which is triploid. This secondary triploid zygote develops into the endosperm. 
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