Which organ supplies a human's bloodstream with oxygen from the air, which can then be taken through the blood to the muscle cells of the arm?

A frog lays thousands of eggs because many eggs die this is a behavior is an example of

Which of the following is the most likely result of improper data collection in a scientific experiment? A. Poor experimental design B. Creative problem solving C. Unclear or inaccurate results D. New discoveries

A cell can only grow so large in size, because

What happens during DNA transcription

The contractile vacuole is an organelle found in paramecia, a group of unicellular organisms. Contractile vacuole pump out fresh water that accumulates in the organisms by osmosis.

We will consider two genes found in tomato plants. one gene (r) affects fruit color, and the other (wf) affects flower color. red fruit and yellow flowers are the dominant characteristics, while yellow fruit and white flowers are recessive.

Ecosystem observation activity

What is it called when a trees roots grows into rocks and breaks down into smaller parts

Classify the organisms based on how they obtain food

When the stimulus intensity is increased what changes the number of synaptic vesicles?