Biology Leap Review

Over time, the number of Amazon River dolphin deaths has decreased.

Which prediction best describes what will happen first as a result of a decreased death rate?

• The population will decrease because all the dolphins will starve.

• The population will stay the same size because the dolphins will live longer.

• The population will increase because more dolphins will survive and reproduce.

• The population will decrease for a while and then increase so that the population size is balanced.

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Sometimes a dolphin will be forced out of its group. Predict two effect of a dolphin living without a group. THIS WOULD BE LIKE A SHORT ANSWER QUESTION ON LEAP.

• The dolphin might be more likely to be eaten by predators as there are no other dolphins to provide protection from predators.

• The dolphin might be more likely to survive being eaten by predators as there are more dolphins to provide protection from predators.

• The dolphin may be able to find more food due to the cooperation of other dolphins.

• The dolphin may not be able to find as much food without the cooperation of other dolphins.

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The diagram shows two parent horses and their foal.

Which statements identify traits the foal most likely inherited from its parents?

Select the two correct answers.

• gray hair from its mother

• a white tail from its mother

• a solid hair color from both parents

• a spotted hair pattern from its father

• white hair on its face from both parents

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People need vitamin D to help their bones get enough calcium so that the bones can be strong. People can get vitamin D from milk, fish, and mushrooms. People’s bodies can also make vitamin D when their skin absorbs light from the Sun. Which situation will most likely cause a person’s bones to become weak?

• The person spends a lot of time outside.

• The person avoids foods with vitamin D.

• The person eats cereal with milk for breakfast each morning.

• The person eats lots of fish that provide vitamin D.

Which effects will most likely be caused by introducing black carp into new ecosystems?

Select the two correct answers.

• Other types of fish will find new food sources.

• Some types of snails will disappear from the ecosystems.

• The water in rivers will become dirty as black carp eat more mussels.

• Plants that live in rivers will be healthier because fewer nutrients will be in the water.

• The number of large predators will increase because they will have more kinds of fish to eat.

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What is the definition of population?

• The place where many animals live

• To blend in with sourroundings

• All the same organisms in the same place and the same time

• To pretend to be something or someone else

What is the definition of habitat?

• A place that an organism naturally lives in

• Something an organism eats

• To break down

• A special feature that an organism has to survive.

Which of the following best describes the role of chlorophyll in photosynthesis?

• A) It absorbs light energy to convert carbon dioxide and water into glucose.

• B) It provides structural support to the plant cells.

• C) It transports water and nutrients from the roots to the leaves.

• D) It stores the energy produced during photosynthesis.

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What is the primary function of the mitochondria in eukaryotic cells?

• A) To synthesize proteins.

• B) To produce energy in the form of ATP.

• C) To store genetic information.

• D) To facilitate cell division.

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In a controlled experiment, what is the purpose of the control group?

• A) To provide a standard for comparison against the experimental group.

• B) To ensure that the experiment is conducted ethically.

• C) To increase the sample size of the experiment.

• D) To manipulate the independent variable.