A blastocyst is associated with which stage of the reproductive cycle?

A. Puberty in the offspring

B. The first trimester of pregnancy

C. The second trimester of pregnancy

D. The third trimester of pregnancy

Fossil fuels are normally stored in a reservoir deep in the Earth. The carbon in fossil fuels, including coal and oil, are essentially locked out of the natural carbon cycle due to their location deep in the Earth.

The fourth state of matter, plasma, exists when what happens? A) The atoms in a gas become ionized. B) The atoms in a gas undergo nuclear fission. C) The atoms in a gas lose all intermolecular attraction for one another.

Pine trees have cones instead of flowers, and their seeds are unprotected. What structure are pine trees most likely missing? roots leaves fruits stems

The greater the speed of a gas particle is a container is it. a. greater the pressure b. lower the pressure

Why do some cells have more mitochondria

Explain the relationship between mutation, natural selection, adaption, and extinction

When are phytoplankton counts the highest?

Diamond is The hardest mineral on the mohs scale A no nonmetallic element The only mineral with luster An isotope of silicon

What are the three types of interactions between organisms in an ecosystem

The stomach liver and other parts of the digestive tract are contained in the