Which two important factors affect cell differentiation? A. Environmental influences and cytoplasmic determinants B. Sperm binding and acrosome reaction C. Sperm binding and cortical reaction

Which of the following is an example of a human disruption to the balance of nature? a. terracing b. recycling c. conservation d. poaching

The variety of genes within a species or population is called the

Which would most likely cause a forced migration due to loss of habitat?

Which of the following leaf tissues absorbs sunlight? epidermis spongy mesophyll palisade mesophyll

The birth control pill is a good precaution against syphilis. a. True b. False

A human activity that could significantly decrease the amount of carbon dioxide in the air is (1) increasing the use of fossil fuel (2) controlling insect pests that eat stored grain (3) burning garbage and trash to generate electricity (4)

What are somatic cells

What type of bacteria causes environmental change

Contrast a food chain with a food web, and include the total % of energy which is conserved between each level of a food chain

What happens when the lungs recoil? A. Inspiration occurs. B. Internal respiration occurs. C. Ribs and diaphragm muscles contract. D. Expiration occurs.