Based on radiometric dating and the rock and fossil record, scientists have concluded that life has been present on Earth

When a comet nears the sun, what happens to the nucleus? 1. It becomes solid. 2. It becomes visible. 3. It becomes gas. 4. It disappears.

What is formed during fertilization?

A cell has the following features; a nucleus, mitochondria, ribosomes, a cell wall made of chiton and a cell membrane. What type of cell is described? A) animal B) bacteria C) fungi D) plant

If different animals have the same bones, although some are shaped differently and placed in different positions, what would this suggest about these animals? (Organisms having common features suggest?)

What describes a role of enzymes

What will the majority of pathogens in food be killed by? a) antimicrobial secretions from the sebaceous glands in the skin b) mucus in the trachea c) acid in the stomach d) nose hairs

What can high levels of salt do to a plant

What is the composition of earths inner and outer core?

Which is a gamete? A. testis B. steroid C. sperm D. progesterone

A solution should b___ in order to prevent water gain or water loss in a cell