Are chemical
substances necessary for an
organism to be healthy and
survive.
A. Resources
B. Nutrients
C. Energy

Competition occurs between species when

Approximately what wavelength of light is best absorbed by chlorophyll a

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.