bio test review

Question 1

Antiobiotic Resistance

Answer 1

Effect of natural selection due to selection pressure of use of antibiotics on populations of bacteria.

Question 2

Staph aureus

Answer 2

certain strain/population that has become resistant to antibiotics

Question 3

MSRA methicillin-resistant Staphylococcus aureus

Answer 3

An infection caused by specific bacteria that have become resistance too many antibiotics

Question 4

MSRA

Answer 4

methicillin-resistant staphylococcus aureus

Question 5

DDT

Answer 5

mosquitos became resitant to months after it was made

Question 6

Homology

Answer 6

similarity resulting from common ancestry

Question 7

molecular homologies

Answer 7

Organisms that are thought to be more closely related are found to be more similar in their DNA

Question 8

Soapberry bugs

Answer 8

use their “beak” to feed on seeds within fruits

Question 9

comparitive embryology

Answer 9

embryos of similar organisms have very similar early development indicating similar DNA at work

Question 10

Fossil Structure

Answer 10

documents change over time, transitions from land to ocean, ex: ankle bones reveal whales came from hooved animals

Question 11

Ungulates

Answer 11

Mammals with hooves

Question 12

limitations of fossils

Answer 12

1) Animals had to die in the right place

2) The fossils had to avoid geologic damage

3) The fossil has to be exposed

4) The fossil has to be found

5) Most soft-bodied animals probably left no fossils

Question 13

radiometric dating

Answer 13

Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.

Question 14

half-life

Answer 14

amount time it takes 50% of an atom to decay

Question 15

isotype

Answer 15

atom with different number of neutrons (5730 years) , one isotype will decay into another