natural selection

Question 1

DNA

Answer 1

a molecule that is present of all living cells and that contains the info that determinants the traits that a living things inherits and needs to live.

Question 2

Nucleotide

Answer 2

a nucleic-acid chain, a sub unit that consists of a sugar a phosphate and a nitrogenous base.

Question 3

Mutations

Answer 3

a change in the nucleotide-base sequence of a gene or DNA molecule

Question 4

Adaptation

Answer 4

a characteristic that improves an individual’s ability to survive and reproduce in a particular environment

Question 5

Species

Answer 5

a group of organizes that are closely related

Question 6

Evolution

Answer 6

the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth

Question 7

Fossils

Answer 7

the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.

Question 8

Fossil Record

Answer 8

A term used by paleontologists ( see paleontology) to refer to the total number of fossils that have been discovered, as well as to the information derived from them.

Question 9

Charles Darwin

Answer 9

Charles Robert Darwin, FRS FRGS FLS FZS was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution.

Question 10

Trait

Answer 10

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

Question 11

Selective Breeding

Answer 11

also known as artificial selection, is a process used by humans to develop new organisms with desirable characteristics.

Question 12

Natural Selection

Answer 12

the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

Question 13

Generation Time

Answer 13

In population biology and demography, the generation time is the average time between two consecutive generations in the lineages of a population. In human populations, the generation time typically ranges from 22 to 33 years.

Question 14

Speciation

Answer 14

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

Question 15

Primates

Answer 15

the chief bishop or archbishop of a province.

Question 16

Hominid

Answer 16

a primate of a family ( Hominid ) that includes humans and their fossil ancestors and also (in recent systems) at least some of the great apes.

Question 17

Homo sapiens

Answer 17

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

Question 18

Chargaff’s Rules

Answer 18

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 19

Watson and Crick

Answer 19

The two twentieth-century biologists (James D. Watson of the United States and Francis H. C. Crick of England) who discovered the double helix of DNA.

Question 20

Rosalind Franklin

Answer 20

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