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

As a college student, you are trying to be healthy and Calorie conscious by making yourself a lettuce and tomato sandwich for supper. After making the sandwich, you decide it needs something extra.

According to the animation, to what genetic element does the rna polymerase bind? according to the animation, to what genetic element does the rna polymerase bind? the operator the repressor mrna the repressor protei

Can speed up chemical reactions

Explain the reasoning establishing that a sequence of three nucleotides (a triplet codon) is the basic unit of the code relating DNA to protein.

Edgar is stranded on an island surrounded by an ocean of salt water. He is thirsty, but he knows that it is a bad idea to drink salt water. How could Edgar separate the salt out of the salt-water mixture? A. pour the mixture through a screen B.

Which description is common to both gymnosperms and angiosperms?

How do adolescents behave differently than adults? Are these differences universal or learned?

Which of the following is associated with plates sliding past each other? a. rifts b. subduction zones c. faults d. all of the above

Which of the following most accurately describes the process that must occur when working with research animals covered by U. S.

Female gametophytes in angiosperms are hidden and protected. Where are they found, and what are they called?