The Proterozoic era is defined by the following events: eukaryotic cells first seen stable continents first bacteria fossils the Cambrian explosion oxygen building up in atmosphere

Which set of sex chromosomes do females have?

Mike examines a cell using a microscope. He finds chloroplasts within the cell. Where is this cell most likely to have come from? A.) Mushroom B.) Dog C.) Tree D.) Human

After many years the rocks at the bottom of a stream would most likely become

What is the substage of interphase immediately after a cell divides?

When looking across the periodic table from left to right, which is the first group that contains nonmetals? group 2 group 7 group 14 group 18

Mark is studying jellyfish in a small body of water. Mollusks are a primary food source for jellyfish, and a large number of mollusks have recently been harvested from the area. How will this impact the carrying capacity for the jellyfish?

Summary of newton's laws and their importance to daily lives

Explain what is meant by the statement cleaner than coal

What type of cells are produced after fertilization occurs and the gametes combine? A) an egg cell B) a sperm cell C) a diploid zygote D) a haploid zygote

On a hot summer day, you notice a line of dark clouds forming. based on this observation, you go back inside and get an umbrella. what scientific skill have you used.