BIOLOGY HIGH SCHOOL

Are there more adults(18 or over) than kids in this world?

Answers

Answer 1
Answer: With world conditions today its hard for a family to survive. So not to many people will want kids in order to survive. So I say Yes There is.
Answer 2
Answer: Yes there are more adults than children (working age) next level is children and the lowest level is the old age (dependants).

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MIDDLE SCHOOL

A biologist studying a desert ecosystem observes that the population of a lizard species increases following particularly hot, dry period that causes a snake population to decline. What could the biologist hypthesize about the roles of these two species? A) The lizard preys on the snake

B) The lizard is a parasite of the snake

C) The snake and lizard use the same limiting resource

D) The snake is a keystone species in the ecosystem.

Answers

Answer:

D)The snake is a keystone species in the ecosystem.

Explanation:

HIGH SCHOOL

From what types of foods should you get most of your calories?

Answers

One should obtain hs calories from the food sources which are rich in vitamins and minerals, such as fruits, and vegetables. These are low in carbohydrates and fats, and does not provide unnecessary calories, and have the essential components which help in digestion and absorption of food.
HIGH SCHOOL

The binding of a compound to an enzyme is observed to slow down or stop the rate of the reaction catalyzed by the enzyme. Increasing the substrate concentration reduces the inhibitory effects of this compound. Which of the following could account for this observation?

Answers

Answer: A competitive inhibitor slows down the enzyme by competing with the substrate for binding at the active site. Increasing substrate concentrations will reduce the effectiveness of a competitive inhibitor.

Explanation:

Answer:

Explanation:

the compound is a competitive inhibitor

HIGH SCHOOL

if you cross homozygous dominant red flower (RR) with a homozygous recessive white flower (rr), what are the possible genotypes and phenotypes of the offspring?

Answers

The answer is heterozygotes Rr with red flowers.

Dominant red flower (genotype RR) can give only dominant R allele to the offspring.
Recessive white flower (genotype rr) can give only recessive r allele to the offspring.

The cross will look like:
Parents:            RR    x    rr
Offspring:     Rr    Rr    Rr    Rr

Offspring with Rr is heterozygous. In dominant traits, at least one dominant allele is necessary for the expression of the trait. So, heterozygotes express dominant trait: offspring with Rr genotype has red flowers.

Answer:

brainly.com/question/2321016

Explanation:

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MIDDLE SCHOOL

How does the use of a scanning electron microscope differ from that of transmission electron microscopes

Answers

Answer:

A TEM makes images of the shadows that electrons make when they pass through the object of interest. They are absorbed to various degrees, which makes shadows of varying degrees of density.

An SEM makes images of the shadows that electrons make when they scatter from the surface of the object of interest.

MIDDLE SCHOOL

If a virus kills the entire coyote population in this ecosystem eliminating all the predators of the rabbit. Describe what you would expect to see happen to the organisms in this ecosystem in the next 5-10 years.

Answers

The question is assuming that the coyotes are the only predators (hence eliminating all predators of the rabbit).

What would happen is that the rabbit population would continue to thrive throughout the years, until the producers cannot support the rabbits, leading to a mass extinction of the rabbits and the destruction of the ecosystem that used to be there.

MIDDLE SCHOOL

20 points help!!!!! A pea plant with genotype PP (purple flowers) mates with a plant with the genotype pp (white flowers). The dominant allele P codes for purple flowers. The possibility that the offspring will have purple flowers is . If an offspring from this cross mates with a pp, the possibility of homozygous dominant genotype for the flowers will be .

Answers

Answer:

a) The possibility that the offspring will have purple flowers is 100%

b) The possibility of homozygous dominant genotype for the flowers will be 0%

Explanation:

a)

Given

"P" is the dominant allele representing the purple color

"p" is the recessive allele representing the white color

When "PP" is crossed with "pp", the following offsprings are produced

P P

p Pp Pp

p Pp Pp

All the the "Pp" have purple color as "Allele P" (Purple color) is dominant over "Allele p" (white color)

Thus, the possibility that the offspring will have purple flowers is 100%

b)

Given

Offspring produced in part (a) mates with "pp" i.e "Pp" mates with "pp"

Now, when "Pp" mates with "pp" following offsprings are produced

P p

p Pp pp

p Pp pp

Thus, out of four ofsprings there is no offspring which has homozygous dominant genotype (PP) for the flower.

Hence, the possibility of homozygous dominant genotype for the flowers will be 0%

A pea plant with genotype PP (purple flowers) mates with a plant with the genotype pp (white flowers). The dominant allele P codes for purple flowers. The possibility that the offspring will have purple flowers is 100%. If an offspring from this cross mates with a pp, the possibility of homozygous dominant genotype for the flowers will be 50%.

The dominant allele for the flower is P, and the recessive allele for the flower is p.

The possible genotypes of the purple flower is; PP or Pp.

The possible genotype of the white flower is; pp.

HIGH SCHOOL

Many energy sources use turbines to generate electricity. What is one type of energy source that does not use turbines? A. Coal B. Hydroelectric C. Wind D. Solar

Answers

Solar power does not use turbines.
HIGH SCHOOL

Of the following cell components, which is composed of protein fibers that provide shape and organization to eukaryotic cells? a
Chromatin
b
Mitochondria
c
Cytoskeleton
d
DNA
e
Golgi apparatus

Answers

The correct answer is c Cytoskeleton

Cyto means cell and skeleton is self explanatory, therefore, cytoskeleton provides shape of the cell, like normal human skeleton provides shape for us by carrying muscles.
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