Materials are able to move across a cell membrane through one of two methods: active transport or passive transport. what is the difference between active transport and passive transport?
a
active transport requires the cell to form vesicles, while passive transport requires the use of membrane pumps.
b
passive transport is the only form of transport that requires the use of proteins.
c
active transport is the only form of transport that requires the use of proteins.
d
active transport requires the cell to expend energy, while passive transport does not.

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !