What rate refers to the average number of children born to the women in a population during their reproductive years?

a. replacement-level fertility rate

b. total fertility rate

c. population change

d. crude birth rate

e. future birth rate?

Which statement best explains how cellular respiration maintain homeostasis in animals? it maintains body temperature by absorbing energy. it breaks glucose into energy required by the organism. it speeds up metabolism by making oxygen. it produces energy from hormones present in the organism.

Classify the structures as homologous or analogous, depending on their structure and function.

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy