A population is polymorphic for a trait if it is governed by two alleles and if the alleles are present at a frequency of a) less than 5%
b) less than 100%
c) greater than 1%
d) greater than 20%

Is snow a type of precipitation? explain why or why not.

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

What is the surface temperature of the ocean where hurricanes form? greater than 80 celsius approximately 27 celsius at least 76 celsius less than 10.5 celsius