1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bearhunter [10]
3 years ago
12

What are reasons scientists use models?

Biology
1 answer:
vlada-n [284]3 years ago
6 0

Answer:

To study objects that are way too small

You might be interested in
Suppose a population is carrying a condition controlled by two alleles: P (dominant) and p (recessive). Only homozygous individu
Virty [35]

<span>The answer is B. 72.25 percent.

The Hardy-Weinberg principle can be used:</span>

<em>p² + 2pq + q² = 1 </em>and <em>p + q = 1</em>

where <em>p</em> and <em>q</em> are the frequencies of the alleles, and <em>p²</em>, <em>q²</em> and <em>2pq</em> are the frequencies of the genotypes.

<span>The <em>p</em> allele (<em>q</em>) is found in 15% of the population:
q = 15% = 15/100
Thus, q = </span><span>0.15

To calculate the <em>P</em> allele frequency (<em>p</em>), the formula <em>p + q = 1</em> can be used:
If p + q = 1, then p = 1 - q
p = 1 - 0.15
Thus, </span><span>p = 0.85

Knowing the frequency of the <em>P</em> allele (<em>p</em>), it is easy to determine the frequency of the <em>PP </em>genotype (<em>p²</em>):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.</span>

7 0
3 years ago
A marked decrease in brain processing and memory in some older adults is MOST likely caused by: A. inadequate control processes.
Andru [333]

Answer:

Option-B

Explanation:

The brain is an organ composed of neurons which controls all the voluntary and involuntary of animals.  In humans, the brain is located in the skull where the brain is suspended in a fluid called cerebrospinal fluid.

As humans ages and becomes old aged, the neurons in the brain losing their ability to perform their function, if they are lost they cannot be regenerated.

The lesions appear on the white matter of the brain and the brain shrink. Due to these known and other unknown features, the process controlled by these neurons become inadequate and shows slower brain processing and weak memory.

Thus, Option-B is the correct answer.

6 0
3 years ago
What kinds of traits do not evolve through natural selection?
Harrizon [31]

Natural selection doesn't favor traits that are somehow inherently superior. Instead, it favors traits that are beneficial (that is, help an organism survive and reproduce more effectively than its peers) in a specific environment. Traits that are helpful in one environment might actually be harmful in another.

(one again, I hope this helps ^^)

8 0
2 years ago
. What does it mean that the nitrogen gas needs to be "fixed"?
spin [16.1K]

Answer:

Nitrogen cycle

Explanation:

Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a natural or an industrial means to a form of nitrogen such as ammonia. In nature, most nitrogen is harvested from the atmosphere by microorganisms to form ammonia, nitrites, and nitrates that can be used by plants.

4 0
3 years ago
One mineral element that forms the Central atom of chlorophyll​
MA_775_DIABLO [31]

Answer:  magnesium atom

Explanation:

magnesium atom

The chlorophyll molecule consists of a central magnesium atom surrounded by a nitrogen-containing structure called a porphyrin ring; attached to the ring is a long carbon–hydrogen side chain, known as a phytol chain.

3 0
2 years ago
Other questions:
  • Name each numbered stage in the plant cell cycle diagram:
    9·1 answer
  • Name two structural and two functional properties of proteins
    7·1 answer
  • Which components of egg white are responsible for foam formation?
    5·1 answer
  • When walking home, a neighbor's large, aggressive dog gets loose and begins chasing you. you begin running to flee from the dog,
    5·1 answer
  • What happens when the organic matter of the fossil is replaced by stone
    14·1 answer
  • A period is the time required for half of the atoms of a radioactive element to decay
    11·2 answers
  • Which of the following statements about hemoglobin is TRUE?
    11·2 answers
  • Which shows the correct compliment to the following DNA strand. A-T-
    10·1 answer
  • What happens to animals born with a change in species numbers ?
    14·1 answer
  • The freezing point of a 1 m solution of f e c l 3 is expected to be choose. That of a 1 m solution of glucose. This is because f
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!