Jan noticed that when she put a tomato in water, it sank. When she put an apple in water, it floated. Why did the tomato sink while the apple floated?

1.) why do you weigh more in earth then the moon? 2.) why does mass of an object never change regardless if it's on the moon or earth? 2 sentences are fine for each question

Where in the body do you think pepsin and trypsin are most active individually?

Is homeostasis are acquired characteristic for living organisms?

Arthropods like shrimp molt because A. their hard exoskeleton cannot grow larger. B. their body grows faster than their exoskeleton. C. their exoskeleton is damaged. D. their exoskeleton cracks and lets in water.

Which part of a reflex arc would connect a sensory neuron from the face and neck to a motor neuron in a lower section of the spinal cord?

Which is not a characteristic of amniotic sac

What does the nucleus of a human lymphocyte contain? A. Only the genes to produce a specific antigen B. Only the genes to produce a range of antibodies C. Only the genes that control the growth and development of a lymphocyte D.

What is the functions for chloroplast

How do inbreeding and hybridization compare

A species of gray wolf was eliminated from a national park because of unrestricted hunting. As a result, there was a tremendous increase in the population of its prey, the elk. The populations of other herbivores also increased.