BIS 2C Lecture 3: Phylogeny Concepts 2

Please answer carefully

choose which one is correct

Which of these species was the first to craft stone tools?

A) H. heidelbergensis

B) H. erectus

C) H. ergaster

D) H. habilis

E) H. sapiens

I know that the answer will be Australopithecus garhi but it is not here

In what order will the amino acids E, H, I, K be eluted from a column of DEAE-cellulose ion exchange resin (an anion exchanger) by a buffer at pH 6?

A)

E I H K

B)

I E K H

C)

H K E I

D)

K H I E

Consider the following reaction at equilibrium: CO 2 + H 2O ⇌ H 2CO 3. What would be the effect of adding additional H 2O?