Biology Answers

Explain how natural selection operates to bring about evolution including references

Discuss the role of Gene Flow in evolution

Only 2 men could possible be my daughters dad. One guys mom have a crooked pointer pinky. And so does my daughter same hand same pinky. Does that mean my daughter is part of the family whos finger is crooked?

The result of Mitosis/cytokinesis

The result of MEIOSIS/cytokinesis

You have prepared a 0.11 M acetate buffer solution in a volume of 1 L at pH 5.76. You then added 80 mL of 0.1 M HCl to the solution. What is the final pH?

pKa of acetic acid: 4.76

How is the initiation codon, identified by the ribosomes during translation in prokaryotes and Eukaryotes?

USE THESE WORDS AND PHRASES TO COMPLETE THE GEOLOGIC TIME SCALE BELOW:

Precambrian, Cenozoic, Paleozoic, Mesozoic, Age of mammals, Age of dinosaurs, First bony fish, Humans, First prokaryotes, Pangaea formed, Abundance of carbonate rocks, Most mountain ranges formed, Pangaea split, Appearance of grasses and coral reefs

ERA               GEOLOGICAL EVENTS                    EVOLUTION OF LIFE FORMS

1.      Which of the following statement is true about the different mechanism of evolution?

A.     Natural selection works by selecting alleles that confer beneficial traits or behaviour.

B.     Mutations introduce new alleles into a population.

C.     Allele frequencies can change as a result of gene flow

D.     All of the above

2.      Which organism first dominated the earth?

A.     Dinosaurs

B.     Fishes

C.     Plants

D.     Bacteria

1.      Which of the following situations will lead to natural selection?

A.     The seeds of the two plants land near each other and one grows longer than the other

B.     Two types of fish eat the same king of food, and one is better able to gather food than the other

C.     Male lions compete for the right to mate with females, with only one possible winner

D.     All of the above

2.      When male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms?

A.     Natural selection

B.     Artificial selection

C.     Recombinant DNA

D.     All of these