Biology I-1: Chapter 7 Test

The diffusion of water across a selectively permeable membrane is called

• osmosis.

• osmotic pressure.

• pinocytosis.

• active transport.

Which term describes the relatively constant internal physical conditions of an organism?

• cell specialization

• homeostasis

• organ system

• unicellularity

Diffusion occurs because

• molecules constantly move and collide with each other.

• molecules are attracted to one another.

• cellular energy forces molecules to collide with each other.

• cellular energy pumps molecules across the cell membrane.

Which of the following is a function of the nucleus?

• stores DNA

• stores sugars

• builds proteins

• packages proteins

Which organelle would you expect to find in plant cells but not animals cells?

• chloroplast

• mitochondrion

• ribosome

• smooth endoplasmic reticulum

Which of the following organisms are prokaryotes?

• bacteria

• plants

• animals

• fungi

Which structure makes proteins using coded instructions that come from the nucleus?

• ribosome

• Golgi apparatus

• mitochondrion

• vacuole

Looking at a cell under a microscope, you note that it is a prokaryote. How do you know?

• The cell lacks genetic material.

• The cell lacks a cell membrane.

• The cell lacks cytoplasm.

• The cell lacks a nucleus.

Which list represents the levels of organization in a multicellular organism from the simplest level to the most complex level?

• cell, tissue, organ system, organ

• tissue, organ, organ system, cell

• cell, tissue, organ, organ system

• organ system, organ, tissue, cell

Which of the following is NOT a principle of cell theory?

• Very few cells are able to reproduce.

• Cells are the basic units of life.

• All cells are produced from existing cells.

• All living things are made of cells.