natural selection

Question 1

DNA

Answer 1

a molecule that is present in all living cells and that contains the information that determines the traits that a living thing inherits and needs to live.

Question 2

nucleotide

Answer 2

in a nucleic-acid chain, a subunit that consists of a sugar, a phosphate, and a nitrogenous base.

Question 3

chargaff’s rules

Answer 3

Chargaff’s rules state that DNA from any cell of any organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.

Question 4

watson and crick

Answer 4

was a British molecular biologist, biophysicist, and neuroscientist, most noted for being a co-discoverer of the structure of the DNA molecule in 1953 with Rosalind Franklin and James Watson.

Question 5

rosalind franklin

Answer 5

an English chemist and X-ray crystallographer who made contributions to the understanding of the molecular structures of DNA, RNA, viruses, coal, and graphite.

Question 6

mutations

Answer 6

a mutation is the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.

Question 7

adaptation

Answer 7

the action or proccess of adapting or being adapted.

Question 8

species

Answer 8

a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.

Question 9

evolution

Answer 9

Evolution is change in the heritable characteristics of biological populations over successive generations.

Question 10

fossils

Answer 10

A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age.

Question 11

fossil record

Answer 11

a biannual peer-reviewed scientific journal covering palaeontology.

Question 12

charles darwin

Answer 12

an English naturalist, geologist and biologist, best known for his contributions to the science of evolution.

Question 13

trait

Answer 13

a distinguishing quality or characteristic, typically one belonging to a person.

Question 14

selective breeding

Answer 14

the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.

Question 15

natural selection

Answer 15

the differential survival and reproduction of individuals due to differences in phenotype.

Question 16

generation time

Answer 16

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

Question 17

speciation

Answer 17

the formation of new and distinct species in the course of evolution.

Question 18

primates

Answer 18

a mammal of the order Primates. In taxonomy, primates include two distinct lineages, strepsirrhines and haplorhines.

Question 19

hominid

Answer 19

a taxonomic family of primates that includes eight extant species in four generations.

Question 20

homo sapiens

Answer 20

Humans are the only extant members of the subtribe Hominina. They are characterized by erect posture and bipedal locomotion. /……………………