If the sperm gamete that fertilizes an egg has a(n) chromosome, it will form female offspring. x y xy xx

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans

Which of the following do all living things have in common