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Lana71 [14]
3 years ago
9

A team led by evolutionary biologist Hopi Hoekstra set out to test the hypothesis that predators are an agent of natural selecti

on on mouse color. They made 250 plasticine models of mice that were alike in every way except that half were painted white and half were painted brown. Complete a paragraph about two advantages and one disadvantage of using model mice instead of real mice in this experiment.
Biology
1 answer:
Svetlanka [38]3 years ago
3 0

Answer:

One advantage of models is that all the mice are exactly alike except for color, enabling the control of all variables except the one being studied. Models are also easier to work with than live mice. One disadvantage of using models is that they do not have the same smell and behaviors as real mice.

Another advantage is that models can be reused for the experiment for a longer period of time with less maintenance.

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What vitamin derivative is used in medications for skin wrinkling and acne. health in later years?
Liono4ka [1.6K]
Answer:
             Vitamin C is one of the most important ingredient of skin as it play a key role in synthesis of collagen necessary for elasticity of skin. 

Derivatives of vitamin C:
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<span>1. Ascorbyl-6-palmitate
2. Magnesium ascorbyl phosphate
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                                         There are four derivatives of vitamin A use in treating skin wrinkling, these are:

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7 0
4 years ago
Under which of the following circumstances would natural selection not operate on an organism?
mote1985 [20]
D......................
8 0
3 years ago
Water moves downstream because of a gradient in which of the following?
natima [27]
A. Pressure.. Because there is a lot of water going in the same direction
6 0
3 years ago
How would a small, uncharged lipid move across the cell membrane?
ElenaW [278]

Answer:

Through simple diffusion, down the concentration gradient.

Explanation:

The phospholipids of the membrane are amphipathic with hydrophillic heads and hydrophobic tails. Other polar molecules cannot go through this hydrophobic interior. Since small uncharged lipids are non polar and hydrohobic, they are able to go through the membrane without the help of transport proteins. Therefore, the last two options can be ruled out because facilitated diffusion includes the use of a protein. Diffusion involves molecules moving down the concentration gradient so the second option can be ruled out.

5 0
3 years ago
What stage is the glucose molecule formed
anyanavicka [17]

Answer:

  1. GLYCOLYSIS :- Glycolysis is the metabolic pathway that converts glucose C₆H₁₂O₆, into pyruvic acid, CH₃COCOOH. The free energy released in this process is used to form the high-energy molecules adenosine triphosphate and reduced nicotinamide adenine dinucleotide
  2. PRODUCTS :- Glycolysis produces 2 ATP, 2 NADH, and 2 pyruvate molecules: Glycolysis, or the aerobic catabolic breakdown of glucose, produces energy in the form of ATP, NADH, and pyruvate, which itself enters the citric acid cycle to produce more energy.
  3. INPUT:- Glycolysis is the first step in cellular respiration, occurring in all living cells. Overall, the input for glycolysis is one glucose, two ATP and two NAD+ molecules giving rise to two pyruvate molecules, four ATP and two NADH.
  4. BREAKDOWN:- During glycolysis, glucose ultimately breaks down into pyruvate and energy; a total of 2 ATP is derived in the process (Glucose + 2 NAD+ + 2 ADP + 2 Pi --> 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O). The hydroxyl groups allow for phosphorylation. The specific form of glucose used in glycolysis is glucose 6-phosphate
  5. STAGES:-
  • Reaction 1: glucose phosphorylation to glucose 6-phosphate.
  • Reaction 2: isomerization of glucose 6-phosphate to fructose 6-phosphate
  • Reaction 3: phosphorylation of fructose 6-phosphate to fructose 1,6-bisphosphate
  • Reaction 4: cleavage of fructose 1,6-bisphosphate into two three-carbon fragments.

Explanation:

<h2>HOPE IT HELPS YOU ITZ ADMIRER </h2>

4 0
2 years ago
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