Many male birds will expend A great deal of energy building nests. Females will mate with the males who build the best nest. This is best described as an example of ___. a) natural selection
b) sexual selection
c) runaway selection
d) an invasive species
e) disruptive selection

What element is able to combine with itself and hydrogen to form large molecules ?

Answer ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million