The 20 amino acids vary only in their?

a. carboxyl groups

b. side groups

c. amino groups

d. lipid groups

How turning a small forest and the meadow around it into a shopping center affects the enviroment

Which row (A, B, C or D) best matches each ground tissue with its function?

If a child has blood type o and its mother has type a, would a man with type b be the father

Which of these always remains unchanged over time? A: the understanding of how diseases affect people B: the way in which diseases are treated C: the number of people who have diseases D: the causes of human diseases

What is the difference between cornea and conjunctiva

Which region of a tRNA molecule binds to amino acids? a. Anticodon loop b. Codon loop c. The 3' end d. Variable loop

Enzymes are made of protein and a non protein therefore they can not be denatured? True or false?

Who was the first person to attempt to classify the living organisms on earth?

Samples as small as a few skin cells can potentially contain DNA. T/F

At times, the only fossil remains of a dinosaur biped are its footprints. Scientists use footprints to estimate the dinosaur's size. In bipeds, the footprint length is about one quarter to one fifth the length of the dinosaur's leg.