7th Grade Science Review Quiz 8

Which human body systems are directly involved in reflex actions, such as knee jerk, blinking, and jumping when startled?

• circulatory and respiratory

• digestive and excretory

• nervous and muscular

• reproductive and skeletal

The diagram represents a pond community containing a variety of plants and animals. Why are the fish able to survive in the pond?

• The fish use carbon dioxide produced by the plants.

• The fish use oxygen produced by the plants.

• The plants use oxygen produced by the fish.

• The plants use chlorophyll produced by the fish.

The diagram shows how a frog develops. A fertilized egg hatches into a tadpole with gills. The tadpole develops legs and lungs and becomes an adult frog. What is the term for this series of changes during the life cycle of the frog?

• fertilization

• reproduction

• mutation

• metamorphosis

Running is an activity that causes the cells in the muscular system to use oxygen at a faster rate. Which system responds by delivering more oxygen to these cells?

• digestive

• nervous

• circulatory

• endocrine

Which group is made up of organisms that are all members of the same kingdom?

• cat, frog, and mushroom

• mold, bacteria, and apple tree

• corn plant, worm, and shark

• grass, rose bush, and venus fly trap