Grassland ecosystems receive very little precipitation. the predominant plants are grasses, and drought and wildfire are common. temperatures in grasslands are warm in the summer and cold in the winter. which of the following describes a biotic component of a grassland ecosystem? a. grasses are common. b. temperatures are warm in the summer. c. there is little precipitation. d. wildfires are common. o_o

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.