What are the four main classes of large molecules in living things?

What structure is responsible for the growth of seedless plants? a. spores c. sori b. rhizoids d. none of the above

How many copies of a gene are in a cell that is product of meiosis i?

How can two items of the same shape and size have different densities?

What must happen before chemical reaction can begin

Oswald and Avery repeated Griffith's work in 1944. What were they trying to figure out?

which of the following is a energy consuming process a. excretion b. anabolism c. both a and b d. catabolism

Describe what it means for a field of study to be considered a science

Why are organisms that have organs classified as more complex than organisms without organs?

What is the final energy source that the muscles need in order to move? fat, sugar, ATP, or glycogen

What provides clues about the ocean and climate including the type of marine life presented? A. the density, temp, and salinity of ocean water. B. the volume, density, and salinity of the ocean water C. the mass, volume, and density in ocean water D.