Which of the following body systems do both roundworms and flatworms lack?

A. circulatory

B. digestive

C. nervous

D. none of the above

Photosynthesis is carried out by which of the following? A. all living organisms B. bacteria, but neither animals nor plants C. animals, but not plants D. plants, but not animals

8. A codon is a triplet base sequence in A tRNA BrRNA CmRNA OD DNA

What human characteristics does mexico share with nearby regions or countries?

Explain how biogeochemical cycles and the rock cycle are important for life on Earth.

White light is a blending of all the colors of visible light

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.

Which of the following is an example of a cultural control of pests? using natural pest predators using pest hormones using synthetic pesticides keeping homes clean