BIOLOGY HIGH SCHOOL

Which of the following statements is correct? The earth is cooled by terrestrial radiation.
The earth's temperature is not affected by solar radiation.
The earth is heated by terrestrial radiation.
The earth's temperature is not affected by terrestrial radiation.

Answers

Answer 1
Answer: The answer would be C, "The earth is heated by terrestrial radiation."

Terrestrial radiation is a factor in what heats up the earth and it's a major factor in the study of global warming. 
Answer 2
Answer:

The following answer is correct :

The earth is heated by terrestrial radiation.

Terrestrial radiation is a radiation emitted by naturally radioactive materials present on Earth including uranium, thorium etc. Solar radiation produced from the sun also heats up the environment but not directly. But rather it is heated by the terrestrial radiation that the planet itself emits.

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Where are short tandem repeats found in the cell (STR)? a) as part of the genes
b) non-coding DNA
c) nucleoplasm
d) at the ends of the complete DNA strands

Answers

d) at the ends of the complete DNA strands

Chromosome is the instruction that consist the gene. A gene is a hereditary unit that is made up of  a sequence of DNA that occupies a specific location or site  on a chromosome, and which can be transcribed or copied into an RNA molecule that may function just as it is, or be translated  into amino acids.

A researcher creates random copolymers of three nucleotides by mixing polynucleotide phosphorylase with guanine and adenine nucleotides in a ratio of 5 guanine nucleotides to 1 adenine. Which of the following three nucleotide copolymers would most likely be most abundant? A. GGG D. GAA E. AAA B. GAG C. AGA

Answers

The answer is A. GGG.

To calculate this, a multiplication rule is used. The multiplication rule calculates the probability that both of two events will occur. In this method, the possibilities of each event are multiplied.

If a ratio is 5 guanine to 1 adenine, this means that the possibility of adenine to be created is (1)/(6), and the possibility of guanine to be created is (5)/(6).

Now, we will use the multiplication rule to calculate the possibility of creation each of these 5 copolymers:
GGG - (5)/(6) × (5)/(6) × (5)/(6) = 0.58
GAA - (5)/(6)  × (1)/(6) × (1)/(6) = 0.02
AAA - (1)/(6)  × (1)/(6) × (1)/(6) = 0.005
GAG - (5)/(6)  × (1)/(6) × (5)/(6) = 0.12
AGA - (1)/(6)  × (5)/(6) × (1)/(6) = 0.02

According to this, the greatest possibility to be created has copolymer GGG.

How do amoebas obtain food?

Answers

their cell wall surrounds it and secretes enzymes that encase it into a bubble and brings it into the cell. After other enzymes digest what is needed the process reverses and the bubble is 'spit' out or excreted.

Which parts of the earthworm serve as its brain

Answers

the part of the worm that serves as its brain is the cerebral ganglion 

Heredity refers to the __________.a. removal of DNA from the human body
b. formation of chromosomes from DNA
c. many types of Aryan genes
d. passing of traits from parents to children

Answers

Hereditary refers to a passing of traits from parent to children. When you say heredited it means that something from their parents are passed to their children, may it be th physical appearance, emotional characteristics and in many more aspects.

Answer: The correct answer for the fill in the blank is D) Passing of traits from parents to children.

Heredity can be defined as the passing of traits from one generation to the next generation. These traits can be the mental or physical characteristics of the parent. The traits are passed to the offsprings in the form of genetic material, which is DNA ( deoxyribonucleic acid) in most of the life forms.

Example- The genes ( segment of DNA, which code for specific proteins) for green eyes are passed from parent to child. This gives green eye color to the child.

Thus, the correct answer is Heredity refers to the passing of traits from parents to children

A gene for eye color in an island fly species has two alleles: the dominant allele codes for blue eyes, and the recessive allele codes for green eyes. If genetic drift is the only force that changes allele frequencies in a fly population, what is expected to happen to the blue and green eye allele frequencies in the population?

Answers

Answer:

The changes in the frequencies of blue and green eye alleles can not be predicted since genetic drift is a random event.  

Explanation:

Genetic drift is the change in the allele frequencies of a population caused by some chance event. The effect of genetic drift is more pronounced in smaller populations since random events cause changes of greater magnitude in a small population. It can cause the complete loss of an allele from a small population.

According to the given information, the frequencies of alleles for green and blue eyes are changed by genetic drift which in turn would produce random evolutionary changes Either of the alleles may be eliminated from the population irrespective of the fact that the allele is beneficial or harmful. Thus, genetic drift would change the frequencies of the allele in an unpredictable manner.

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