31 Jan C. differential traits.

Question 1

1. If the gene for a trait is carried on an X or Y chromosome, it’s a _______ trait.

A. polygenic

B. sex-linked

C. codominant

D. dominant

Question 2

2. Which of the following is not part of the structure of a nucleotide?

A. Sugar

B. Phosphate group

C. Nitrogen base

D. Amino acid

Question 3

3. Which of the following terms refers to how genetic traits are expressed?

A. Dominance

B. Phenotype

C. Display

D. Genotype

Question 4

4. Which of the following is not a type of adaptation?

A. Structural

B. Behavioral

C. Functional

D. Mechanical

Question 5

5. Water is able to dissolve many substances because of its

A. viscosity.

B. polarity.

C. solubility.

D. state.

Question 6

6. When a farmer crosses two different types of plants to grow one that has a desirable trait from each, this process is known as

A. trait farming.

B. agricultural manipulation.

C. genetic mutation.

D. selective breeding.

Question 7

7. A _______ is a tool that shows genetic traits that run in a family, such as cancer.

A. genealogy

B. inheritance

C. dominance

D. pedigree

Question 8

8. By studying genetics, scientists have learned that _______ control how organisms develop.

A. bacteria

B. genes

C. phenotypes

D. genotypes

Question 9

9. Blood clotting and childbirth are examples of

A. sensory input.

B. positive feedback.

C. hormonal control.

D. negative feedback.

Question 10

10. Which part of the body is responsible for absorbing nutrients?

A. Large intestine

B. Small intestine

C. Stomach

D. Pancreas

Question 11

11. Only six elements make up 99% of the human body’s mass. The six elements are

A. carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus.

B. oxygen, hydrogen, nitrogen, calcium, phosphorus, and zinc.

C. carbon, oxygen, hydrogen, nitrogen, calcium, and sodium.

D. oxygen, hydrogen, nitrogen, calcium, phosphorus, and sodium.

Question 12

12. _______ are on chromosomes in the nucleus of a cell.

A. Genes

B. Traits

C. Mutations

D. Alleles

Question 13

13. Factors like lack of variation and environmental changes can cause a species to fail to survive. This is known as

A. extinction.

B. conservation.

C. evolution.

D. mutation.

Question 14

14. Which of the following is not a function of protein?

A. Helping cells communicate

B. Serving as enzymes

C. Giving cells structure

D. Insulating the body

Question 15

15. Change over time is referred to as

A. mutation.

B. variation.

C. evolution.

D. adaptation.

Question 16

16. Which of the following is not a macromolecule?

A. Platelet

B. Protein

C. Lipid

D. Carbohydrate

Question 17

17. Which of the following is not a carbohydrate?

A. Sugars

B. Cellulose

C. Starches

D. Cholesterol

Question 18

18. The process by which the nervous system bypasses the brain to increase response time is called a

A. contraction.

B. hormonal response.

C. reflex.

D. feedback mechanism.

Question 19

19. Slight differences in inherited traits, such as feather color in birds, are called

A. homozygous traits.

B. variations.

C. differential traits.

D. adaptations.

Question 20

20. Which of the following is not true of mutations?

A. Mutations can be passed from parent to child.

B. A mutation can result in a change of function.

C. Mutations can’t result in a change in appearance.

D. A mutation is permanent.