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lions [1.4K]
2 years ago
13

Distinguish between manipulative experiments and natural experiments.

Biology
1 answer:
GuDViN [60]2 years ago
6 0
Manipulative experiments alter levels of a predictor variable (or factor), and then measures how one or more variables respond to these alterations. ... Natural experiments-An observational study in which we take advantage of natural variation that is present in the variable of interest.
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Which structure of a flower releases pollen? anther
Mariana [72]

Answer:

Anther

Explanation:

Stamen: The pollen producing part of a flower, usually with a slender filament supporting the anther.

Anther: The part of the stamen where pollen is produced.

Pistil: The ovule producing part of a flower. The ovary often supports a long style, topped by a stigma.

4 0
3 years ago
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19. How do ctenophores move?
Leona [35]

Answer:

Explanation: Ctenophores move in water, they have a flapping motion.

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3 years ago
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Owl butterflies feed on mostly fruit, and owls feed on small animals. The images show an owl butterfly and an owl. How does the
Olegator [25]

Answer:

The adaptation in owl butterfly helps it to camouflage and also protects it from predators. Adaptations allow organisms to be better suited to their environment. So the answer is both 'A' and 'B' .

Explanation:

Owl butterfly use the concept of mimicry. It is a form of <em>adaptation</em> in which they fool the predator in thinking that they are owls and not butterflies. These butterflies have eyespots under their wings. By flashing them they look like the <em>eyes </em>of an owl.

Since owls feed on small animals, and small animals feed on butterflies, the owl butterflies protect themselves from predators. The small animals thinking that the butterfly is an owl, run away instead of coming closer. This way these small insects camouflage and protect themselves.

7 0
3 years ago
Any factor that changes the shape of an enzyme can affect the enzyme's activity. Which of the following two factors affect an en
kupik [55]

Considering the choices;

A. blood glucose level and pH

B. amount of light and temperature

C. amount of light and pressure

D. temperature and pH

Answer;

D. temperature and pH

The two factors affect an enzyme's operation the most is the temperature and pH.

Explanation;

Enzymes work best at optimum pH and temperature.

At low temperature for example the enzymes are inactivated while at high temperatures enzymes are denatured.

At optimal temperature and pH; the chemical reaction rate is optimal.

4 0
3 years ago
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What are 2 facts about energy?
elixir [45]

Answer: Only 10 percent of energy in a light bulb is used to create light. ...

The amount of energy Americans use doubles every 20 years. ...

Explanation:

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3 years ago
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