Not all of the human genome codes for proteins. Which of the following characteristics describes about 50 percent of the human genome?
genes that code for proteins
B sequences that regulate genes that code for proteins
C genes that code for RNA molecules
D highly repetitive sequences
E imprinted sequences

How do you transfer mrna into codons ? i'm so confused : (

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.

What type of tree is the tallest tree in the world?