natural

Question 1

DNA

Answer 1

extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each other in a ladderlike arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanine, cytosine, and thymine

Question 2

Chargaff’s rules

Answer 2

states that DNA from any cell of all organisms should have a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.

Question 3

Watson and crick

Answer 3

discoverd the double helix of dna

Question 4

Rosalind franklin

Answer 4

Rosalind Franklin’s X-ray studies of molecules played a crucial role in the 1953 discovery of the structure of DNA.

Question 5

mutations

Answer 5

sudden departure from the parent type in one or more heritable characteristics, caused by a change in a gene or a chromosome.

Question 6

adaption

Answer 6

any alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment.

Question 7

species

Answer 7

class of individuals having some common characteristics or qualities; distinct sort or kind.

Question 8

evolution

Answer 8

any process of formation or growth

Question 9

fossils

Answer 9

any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint

Question 10

fossils record

Answer 10

the past of fossils collected

Question 11

darwin

Answer 11

seaport in and the capital of Northern Territory, in N Australia

Question 12

selective breeding

Answer 12

intentional mating of two animals in an attempt to produce offspring with desirable characteristics or for the elimination of a trait

Question 13

Natrual selection

Answer 13

selecting unknown

Question 14

generation time

Answer 14

the generation time is the average time between two consecutive generations in the lineages of a population

Question 15

speciation

Answer 15

formation of new species as a result of geographic, physiological, anatomical, or behavioral factors that prevent previously interbreeding populations from breeding with each other

Question 16

primates

Answer 16

formation of new species as a result of geographic, physiological, anatomical, or behavioral factors that prevent previously interbreeding populations from breeding with each other

Question 17

hominid

Answer 17

of the modern or extinct bipedal primates of the family Hominidae, including all species of the genera Homo and Australopithecus

Question 18

homo sapiens

Answer 18

species of bipedal primates to which modern humans belong, characterized by a brain capacity averaging 1400 cc (85 cubic in.