1. A group of early giraffes lives in a lush forest with many trees and shrubs of different heights to feed on. These giraffes have necks of various lengths,
with most giraffes having a medium length neck. Then a blight passed
through the area, killing off all of the low growing plants, leaving only tall
trees whose leaves are far off the ground. Giraffes with shorter necks now
have a hard time getting food, while those with longer necks can feed on the
high growing leaves. After several generations, the giraffes in this area all
have longer necks than those before the blight. What type of selection has
occurred in this giraffe population?

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Coat color in cats is determined by genes at several different loci. at one locus on the x chromosome, one allele (x ) encodes black fur and another allele (xo) encodes orange fur. females can be black (x x ), orange (xoxo), or a mixture of orange and black called tortoiseshell (x xo). males are either black (x y) or orange (xoy). bill has a female tortoiseshell cat named patches. one night, patches escapes from bill\'s house, spends the night out, and mates with a stray male. patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. what are the genotypes of patches, the stray male, and the kittens?

Food webs - transferring energy and matter from one level to another. here you see four food webs. one or more are incorrect. which food web(s) show the correct sequence of organisms, from start to top level consumer? a) a b) d c) c d) a and d