The second generation phenotypes resulting from the cross of purebred monohybrid pollination will display a ratio of _____. 2:2 4:1 3:1 none of the above

Answers

Answer 1
Answer: The answer is 3:1.

If we imagine that plant has two alleles for the trait, we can dominant allele represent with P represents and recessive allele with p. To get purebred monohybrid in the first generation, parents must be a dominant homozygote (PP) and a recessive heterozygote (pp):

Parental generation: PP   x   pp
The first generation: Pp  Pp  Pp  Pp

Pp represents a heterozygote.
If we cross these heterozygotes:

The first generation: Pp   x   Pp
The second generation: PP  Pp  Pp  pp

If dominant allele determines the phenotype, there will be 3 plants (one PP and two Pp) with one phenotype and only 1 plant 
(pp) with another phenotype and vice versa.
Answer 2
Answer:

3:1 is correct, had this question earlier


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Many different species of songbirds migrate into the United States and Canada from Central and South America each summer in order to take advantage of the caterpillars and other insects that hatch in the northern forests during the summer. Over the past several decades songbird populations have been declining. How might a decrease in the number of songbirds be expected to affect the trees in a northern forest?
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Which of the following accurately describes the binomial nomenclature naming system? A. The second word indicates the organism's genus classification. B. The second word is always capitalized. C. The first word is always lowercase. D. The first word indicates the organism's genus classification.

Which of the following classes of biological molecules consist of both small molecules and macromolecular polymers?A) lipidsB) carbohydrates
C) proteins
D) nucleic acids
E) lipids, carbohydrates, proteins, and nucleic acids all consist of only macromolecular polymers

Answers

Answer:

(Correct option is B) Carbohydrates.

Explanation:

Biological molecules are known as the molecules which are found in the organisms, and play some important roles like development, cell division, and morphogenesis. They are necessary for the life.

Carbohydrates are known as the classes of biological molecules which consist of small molecules, and macromolecular polymers both. Carbohydrate are divided into three subtypes of essential macromolecules:

1) Monosaccharides: Fructose, galactose, and glucose are isomers of monosaccharide.

2) Disaccharides: Sucrose is the isomer of disaccharide.

3) Polysaccharides: Starch, cellulose, and glycogen are example of polysaccharide.

Glucose, and sucrose are known as the small molecules of carbohydrates, and other molecules of carbohydrate such as polysaccharides are known as macromolecular polymers.

In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was verifying which factor involved in evolution by natural selection?

Answers

OPTIONS:

a. The organisms vary in trait

b. The variation is inherited

c. More young are born than can survive

d. Some individuals are better adapted to the environment

Answer:

d. Some individuals are better adapted to the environment

Explanation:

Kettlewell’s biological experiment, which was conducted in England, was to study the evolutionary changes taking place in trees in relation to the appearance of dark-colored moth.  

It was observed that white moths were more common before the industrial revolution. After the industrial revolution, which changed the background of the environment of the moths due to pollution, the moths became easily seen and obvious to predatory birds.

It was discovered that peppered moths were selectively preyed on by birds depending on their body color, which serves as the most important factor that determines if moths can survive predation by blending with the background of their environment. This led to the evolving of moths of their color to blend with the background of their environment, which makes them hide from the birds that prey on them.

Kettlewell was trying to verify the factor in evolution by natural selection, which says, “some individuals are better adapted to the environment”.

Are involuntary muscles striated?

Answers

No.The involuntary muscles of the muscular system are not striated or furrowed.


These muscles that arenot striated are very smooth to the sight which is why they are alsocalled Smooth muscles. Involuntary musclesare not striated. Even among the striated muscles that are voluntary,the heart which is also a muscle, is involuntary.
On the other hand the striated muscles, whichare voluntary are highly fibrous and their primary function is to movethe body voluntarily, and producing heat as a result of this muscleaction.


Organisms that are composed of many cells working together to form tissues, organs, and organ systems are referred to as _________. complex unicellular bicellular multicellular

Answers

Multicellular, since they have many cells working together in one organism.

Answer:

Multicellular

Explanation:

ATP is called the energy currency of the cell becauseA) glucose is made of ATP.
B) ATP catalyzes all metabolic reactions.
C) ATP allows one organelle to be exchanged for another.
D) most of the energy that drives metabolism is supplied by ATP.

Answers

ATP is called the energy currency of the cell because most of the energy that drives metabolism is supplied by ATP. Thus, the correct option for this question is D.

What is ATP?

ATP stands for Adenosine Triphosphate. It may be defined as a type of high energy-carrying compound that is significantly produced by the cells of living organisms in order to accomplish all sorts of metabolic activities for their survival.

This ATP is produced by cellular respiration where oxygen and glucose are dissociates in order to produce carbon dioxide, water, and energy in the form of ATP.

This synthesized ATP is then utilized by each and every cell of the living organisms in order to fulfill the required amount of energy to terminate metabolic activities like glycolysis, the Krebs cycle, etc.

Therefore, most of the energy that drives metabolism is supplied by ATP is the most prominent reason for ATP being the energy currency of the cell. Thus, the correct option for this question is D.

To learn more about ATP, refer to the link:

brainly.com/question/25921566

#SPJ2

The answer is most of the energy that drives metabolism is supplied by ATP. ATP is the energy that drives metabolism. The answer is D because I took a quiz and that was the answer.

What make the phosphorus cycle different from carbon cycle

Answers

The phosphorous cycle differs from the carbon cycle in the way that it cannot be found in the gas form.Phosphorous is only found on land, in water and in sediment.