Semes ter test Review Part 1

.A student drew a picture of a human body system shown below. The student labeled some of the organs of the system. The main function of this human body system is to-

• Trap particles that enter the nose

• Exchange gases with the environment

• Chew food as it enters the mouth

• a Exchange solid materials with the environment.

Like all consumers, birds need to eat in order to get energy. What is the transformation of energy that occurs when a bird eats?

• From thermal energy in food to chemical energy in digestion

• From thermal energy in digestion to chemical energy in food.

• From chemical energy in food to thermal energy in digestion.

• from chemical energy in digestion to thermal energy in food.

Which two structure are found in plant cells but not in animal cells?

• nucleus, chloroplasts

• cell wall, cell membrane

• nucleus, cell membrane

• cell wall, chloroplasts

A diagram of a plant cell is shown above. The function of the plant cell structure shown in the enlargement is to —

• provide support for the cell

• use energy from sunlight to make sugar

• direct all the cell’s activities

• regulate substances that enter and exit the cell

Part of the human body system is pictured. The main function of this system is to

• control reproduction

• transport oxygen.

• produce hormones.

• remove waste

Which of the following is most likely to cause a change in the genetic traits in an isolated population of a ground-dwelling lizard species?

• The exposure of an individual lizard in the population to radiation that causes a mutation that is not passed on to its offspring

• An unusually dry summer in the lizard population’s ecosystem

• The introduction of an invasive predator that preys on the brightest-colored individuals in the lizard population

• A fast-moving wildfire that burns the canopy of the trees in the lizard population’s ecosystem

A tiger cub has a pattern of stripes on its fur that is similar to that of its parents. Where are the instructions stored that provide information for a tiger’s fur pattern?

• In cytoplasm inside cells

• On genes within chromosomes

• On the cell membrane

• In the mitochondria

Organisms that reproduce sexually may have a greater chance of surviving than organisms that reproduce asexually when environmental changes occur

because-

• the offspring have the same genetic material as their parents

• only one parent is necessary for reproduction

• there is greater variation in traits among the offspring

• the offspring have identical traits

20. This drawing shows a human body system. What is the primary function of this body system?

• The protection of vital organs from injury

• The chemical breakdown of food into smaller pieces

• The transport of nutrients, water, and oxygen to body cells

• The production of hormones that regulate growth and metabolism

20. Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules into smaller molecules. Which statement best describes changes to food during digestion?

• The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.

• The muscle contractions and the action of the peptidase both result only in physical changes.

• The muscle contractions result in chemical changes, while the action of the peptidase results in physical changes.

• The muscle contractions and the action of the peptidase both result only in chemical changes.