Which of the following statements is part of the cell theory?

A.

All cells come from pre-existing cells.

B.

All living things are made up of one or more cells.

C.

Cells are the basic units of living things.

D.

all of these

A certain species of frog comes in two different colors, green and brown. A population of these frogs live in and along a river. In 1980, a very large drought occurred, causing most of the river to dry up.

Basalt, formed from magma, contains iron-rich minerals. Why is basalt important? A. Iron is magnetic and it triggers the reversal of Earth's magnetic field. B. Iron is rich in nutrients and makes the soil easily identifiable. C.

When a divergent boundary occurs under the ocean it is called

Explain the concept of "natural selection" using your moths as an example

What events occur during respiration?

A bacteriophage injects its DNA into and E. coli which gets intergrated into the bacterial chromosome forming a prophage. What kind of cycle the bacteriophage is undergoing? A lytic cycle B lysogenic cycle C bacterial cycle

Look at the illustration in Figure 25-4. Do you think that the bud on the side of the adult hydra is an embryo? Why? A) No, because budding is a type of asexual reproduction. B) No, because budding is a type of sexual reproduction.

what evidence is there to show that changing sand to glass is a chemical change

A person exhibiting a recessive characteristic must be heterozygous for that gene. True or False

Which statements best describe the first stage of cellular respiration? Check all that apply. •The stage happens in cytoplasm. •The stage happens in mitochondria. •Oxygen combines with small molecules. •Glucose is broken down. Energy is released.