O2 and CO2 can cross a lipid bilayer using what transport method?

How can the enviroment be organized into levels from simple the complex?

What organelles are membrane sacs used to transport molecules? mitochondria vacuoles ribosomes thylakoids

Which of the following would be considered a source of error in an experiment? A. Laboratory mice are similar but not identical to each other. B. A student makes a mistake when measuring volume. C.

A shark's skeleton is different from a goldfish because a. the shark's skeleton is very dense. b. the shark's skeleton is quite rigid. c. the shark's skeleton is composed of bone. d. the shark's skeleton is composed of cartilage.

Describe the differences between spermatogenesis and oogenesis.

Why can't you use visible light to "see" molecules?

A system to maintain homeostasis must have at least four parts that function together. name these abd bruefly explain what each one does

Which of the following is a sac fungus? A rhizopus, B candida C penicillium notatum

What are the stop codons

One factor that can increase sensitivity to sunlight is genetics. a. True b. False