Science

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Connexusacadamy unit test.

identify the choice that best completes the statement or answers the question.

1.Studies conducted in England during the Industrial Revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely explanation for this difference in height is a difference in (1 point)

A.nutrition.
B.family size.
C.genetic makeup.
D.genetic disorders.
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2.A woman with a genetic disease marries a man who does not carry the disease. It is not possible for their children to carry the disease. The disease must be (1 point)

A.sex-linked.
B.recessive.
C.dominant.
D.caused by an extra chromosome.
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3. Which of the following is an example of inbreeding? (1 point)

A.A farmer chooses the cows in his or her herd that produce the most milk and breeds only those cows.

B.A farmer chooses the cows in his or her herd that produce the most milk and breeds them with cows that get sick less often.

C.A farmer chooses the cows in his or her herd that produce the most milk and injects them with hormones that make them produce more milk.

D.A farmer chooses the cows in his or her herd that produce the most milk and pulls them out of the breeding stock.

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4.Scientists have inserted the gene for human insulin into bacteria. These bacteria make the insulin protein, which can then be used by people who have diabetes. This process is an example of (1 point)


A.hybridization.
B.gene therapy.
C.selective breeding.
D.genetic engineering.
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5. Which of the following correctly identifies the sequence of stages of human development? (1 point)

A.embryo zygote fetus embryo
B.blastocyst embryo fetus zygote
C.zygote blastocyst embryo fetus
D.blastocyst zygote embryo fetus
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6.The main purpose of the testes is to make (1 point)
A.eggs.
B.embryos.
C.sperm.
D.zygotes.

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7. Egg-laying land animals have evolved to produce eggs with tough shells to ensure that (1 point)

A.external fertilization can take place.
B.the egg and the sperm can fuse.
C.parental care is unnecessary.
D.the developing embryo does not dry out.

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8. An insect undergoes major changes in its life cycle—from egg, to larva, to pupa, to adult. This insect goes through (1 point)

A.metamorphosis.
B.budding.
C.alternation of generations.
D.internal fertilization.
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9.A woman gives birth to a son. What is the probability that her second child will be a girl? (1 point)

A.0 percent
B.25 percent
C.50 percent
D.100 percent
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10.Two identical flowering plants are planted in neighboring yards. One plant grows tall and healthy, producing numerous pink flowers. The other is small, has brown leaves, and never flowers. What could be the difference between the two plants? (1 point)

A.One of the plants is in the sporophyte generation, which does not flower, while the other is in the gametophyte generation.

B.One of the plants has access to the pollinator it needs, while the other does not.

C.One of the plants contains the genetic information that tells it to flower, while the other does not.

D.One of the plants has the nutrients and light it needs to grow and flower, while the other does not

ok so im trynin to do my unit science quiz..and im getting a 67% in science, so anything will help, thanks

  • Science -

    This unit quiz is supposed to find out what you KNOW.

    Go back and study the unit and try this quiz when you actually know something about these facts.

  • Science -

    Ms. Sue she was just asking for help, there is no need to be rude, also I am in GACA. so next time be nice Ms. Sue

  • Science -

    Be nice Ms.Sue

  • Science -

    she is right though tests are supposed to be about what you know

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