1.which of the following appeared on earth most recently?
a. chordates
b. tetrapods
c. dinosaurs
d. single-gene algae
2.dinosaurs appeared before
a. mammals
b. photosynthesis
c. chordates
d. land plants

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x albino a) all chinchilla b) 1/2 chinchilla, 1/2 albino c) 3/4 chinchilla, 1/4 albino

Asegment of dna that codes for rna and a protein is a

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.