science 8 test

What are the six characteristics of living things?

Cells, Metabolism, Adaptation, Growth, Reproduction, Response to Stimuli.

__________ are the basic unit of life.

Cells.

Metabolism refers to an organism's ability to __________.

Use energy for growth and maintenance.

What is the purpose of adaptation in living organisms?

To adjust to environmental changes.

What distinguishes structural adaptations from behavioral adaptations?

Structural adaptations are physical traits, while behavioral adaptations involve actions taken by organisms.

Animal cells lack a __________ and have a round shape.

Cell wall.

What are the three main types of cells?

Blood Cells, Skin Cells, Brain Cells.

What is the primary function of xylem in vascular tissue?

Transports water.

The movement of particles from high concentration to low concentration is known as __________.

Diffusion.

What is the primary function of leaves in a plant?

The primary site of photosynthesis.

In a hypertonic solution, a cell will __________.

Lose water and shrink.

What type of tissue is responsible for growth in plants?

Meristematic Tissue.

Plant cells contain __________ for photosynthesis.

Chloroplasts.

What is the disadvantage of unicellular organisms?

Limited functions and sensitivity to environmental changes.

The barrier that allows certain substances to pass while blocking others is called __________.

Semi-Permeable Membrane.

What is the advantage of multicellular organisms?

Specialized functions for different cells, generally longer lifespan.

What happens to a cell in an isotonic solution?

No net water movement; the cell remains normal.

__________ are composed of multiple specialized cells that work together.

Organs.

The process by which water moves across a semi-permeable membrane is called __________.

Osmosis.