Did early land animals have gills as well as lungs?

The best action humans can take to decrease the effect of harmful growth and reproduction of algae is to ban the use of fertilizers. decrease crop production. control the use of fertilizers. use other chemicals.

Glucose is not able to pass through a semi-permeable cell membrane. If the cells need sugar to make ATP and carry out cellular processes, how does the sugar get into the cell?

Whta organelle is created in nucleolus and then combines with RNA to make proteins?

An African American organization founded in Detroit in 1930 was A. the Student Nonviolent Coordinating Committee. B. the Congress of Racial Equality. C. the Christian Leadership Conference. D. the Nation of Islam.

Why are the ideas that earth undergoes change and is billionsof years old important for evolutionary theory?

What is the role of cellular reproduction in maintaining genetic continuity

What is the trait that distinguishes primates, rodents / rabbits, crocodiles, and dinosaurs / birds from amphibians and earlier lineages?

John, a 19 year old boy, wanted to figure out why he wasn't sleeping well at night. He normally and heads to bed by 11 pm and wakes up about 6 am.

What is the base-pairing rule for DNA?

What kind of bond forms between oxygen and hydrogen in a single water molecule? A. Ionic B. Metallic C. Polar covalent D. Hydrogen