Many insects, fish, and mammals release certain chemical messengers to signal reproductive readiness. what are these messengers called?

a. hormones

b. pheromones

c. enzymes

Type the correct answer in the box. use numerals instead of words. fiona has a lovely flower bed in her yard. she wants to add a fence along one side of the flower bed. the fence material is sold in meters. fiona knows that her flower bed is 200 centimeters in length. how much fencing material does fiona need in meters? fiona needs meters of fencing material for her flower bed.

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere