Natural Selection

Question 1

DeoxyriboNucleic Acid, 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

Answer 1

DNA

Question 2

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

Answer 2

Nucleotide

Question 3

The amount of adenine in DNA always equals the amount of thymine. The amount of guanine always equals the amount cytosine. His rules helped scientists understand the stucture of DNA.

Answer 3

Chargaff’s Rules

Question 4

DNA must look like a long, twisted ladder. How DNA os copied and how functions in the cell.

Answer 4

Watson and Crick

Question 5

She was able to make images of DNA molecues. In this process known as X-ray diffraction to make these images. In this process, X-rays are aimed at the DNA molecule. When the X-ray hits the part of the molecule, the ray bounces off. The pattern made by the bouncing rays is captured on film.

Answer 5

Rosalind Franklin

Question 6

the process in which inherited charateristics within a population change over generations such that new species sometimes arise

Answer 6

Evolution

Question 7

the remains or physical evidence of an organism preserved by geological processes.

Answer 7

Fossils

Question 8

a historical sequence of life indicated by fossils found in layers of the Earth’s crusts.

Answer 8

Fossil Record

Question 9

a genetically determined characteristic

Answer 9

Trait

Question 10

the human practice of breeding animals or plants that have certain desired characteristics

Answer 10

Selective Breeding

Question 11

the process by which individuals that are better adapted to their envirronment survive and reproduce more successfully than less well adapted individuals do; a theory to explain the mechanism of evolution

Answer 11

Natural Selection

Question 12

He sailed for 5 years around the world as a naturalist- a scientist who studies nature- on The HMS Beagle

Answer 12

Darwin

Question 13

the formation of new species as a result of evolution

Answer 13

Speciation

Question 14

the species of hominids that includes modern humans and thier closest ancestors and that first appeared about 100,000 to 160,000 years ago.

Answer 14

Homo sapiens

Question 15

a type of mammal characterized by opposable thumbs and binocular vision

Answer 15

Primates

Question 16

a type of primate charaterized by bipedalism, relatively long lower. and lack of a tail.

Answer 16

Hominid

Question 17

the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.

Answer 17

Mutations

Question 18

a change or the process of change by which an organism or species becomes better suited to its environment.

Answer 18

Adaption

Question 19

a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. The species is the principal natural taxonomic unit, ranking below a genus and denoted by a Latin binomial, e.g., Homo sapiens.

Answer 19

Species

Question 20

In population biology and demography, the generation time is the average time between two consecutive generations in the lineages of a population.

Answer 20

Generation Time