When did eukaryotes first appear on Earth?

Describe an application of biological classification

The human population is predicted to continue increasing as the rate of climate change also increases. What technology doesn't address the concerns raised by these trends?

Name 3 types of fossils and describe how they form

What is the scientific method? is there just one universal scientific method? why or why not?

Jupiter's mass is very large. What is the most likely reason that we do not generally feel the effects of Jupiter's gravity on Earth?

What is a type of research that involves observation and collecting data but does not include control

Forms of the Ras protein found in tumors usually cause which of the following? A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) growth factor signaling to be

Which property of nervous tissue is fundamental to its function of coordinating the body's activities? O cells that are tightly packed contains extracellular matrix presence of neurons short life span

Polydactylism is a dominant trait that results in extra fingers and toes in humans. A polydactyl man marries a woman with 10 fingers and toes. They have a child that has a normal number of digits.

Why are some sediments smaller than others