Which of the following is a biotic factor of an ecosystem? A. a rock B. air C. grass D. climate

Which of the following is an ectothermic vertebrate

Two species might have similar skeletal structures that have different functions. what do these types of structures suggest about the relationship between the two species?

The biosphere is made of different kinds of matter. Which substance is an example of inorganic matter? A. Protein B. Carbohydrate C. Sugar D. Salt

What is extracted from the uterus and used to identify genetic disorders.

What does a dichotomous key uses

Example to illustrate the internal complexity of cells

What is the source of the pressure that has caused coyotes, which were once essentially diurnal, to adjust to a more nocturnal behavior?

Ants carry dead ants out of the anthill and dump them on a "trash pile." If a live ant is painted with a chemical from dead ants, other ants repeatedly carry it, kicking and struggling, to the trash pile, until the substance wears off.

What is responsible for the structures and functions of organisms

The term 'prehistory' refers to the time before writing was invented. true or false?