Explain how trees can be produced and yet the smallest trophies level in a pyramid of numbers

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?

What is the most abundant vertebrate on earth?

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.