Jack is studying a few new leaf samples. the first leaf sample has a single leaf blade. the second had leaflets arising from a single petiole. the third sample has paired leaflets along a central rachis. him classify these leaves correctly.

a) all three are compound leaves.

b) the first sample is a simple leaf and the other two are compound leaves.

c) the first two samples are simple leaves and the third is a compound leaf.

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.

How energy move through ecosystem ?