What type of circulation is described as the movement of blood from the heart to the lungs and back to the heart again?

a. portal

b. pulmonary

c. renal

d. systemic

An electric generator transforms mechanical energy into electrical energy

Which of the following is true of a zygote? A. lt forms into a blastocyst C. It produces haploid male gametophytes D. It is made up of only one cell B. It is an unfertilized egg

Which factor is different between the tundra biome and tundra ecosystems

When scientists report their results from their scientific investigations, what should scientists include and NOT include in their conclusions?

The male secretory structures that produce a fluid necessary for adequate sperm motility after ejaculation are called the:

Harmless bacteria are what type of bacteria? Milady chapter 5

Which kind of action is a cause of air pollution? A. Poisons are released into a major river. B. Gasoline is burned by a car engine. C. Trash is dropped in a national wildlife preserve. D. Tuna are fished to extinction.

Which questions can be answered using the scientific process

What Contains tube-like structures that carry water and nutrients

How does the polarity of water allow for life on Earth?