evolution

Question 1

define evolution

Answer 1

a change over time

Question 2

define theory

Answer 2

an explanation of something that has been observed in nature which can be supported by facts, models, laws, tested hypothesis .

Question 3

define a biological evolution

Answer 3

change in characteristics of species over time

Question 4

what is a hypothesis

Answer 4

an informed assumption that provides an explanation to a specific phenomenon that can be tested

Question 5

name the four evidences of evolution

Answer 5

genetics
biography
modification by descent
fossils records

Question 6

what are fossils records

Answer 6

the remain of foot prince or imprints on an organism usually preserved in rock

Question 7

what do we call he study of fossils

Answer 7

paleontology

Question 8

define a paleontologists

Answer 8

used to determine the age of fossils and characteristics of an organism by studying its fossils

Question 9

what is biogeography

Answer 9

the study of the distribution of existing and extinct species in a specific geographical species

Question 10

what is modification by descent

Answer 10

different body parts that have been adapted to their environment for optimal function

Question 11

what do we call structures that differ but have the same functions

Answer 11

analogous

Question 12

define a biological species

Answer 12

a group of organisms that have similar

characteristics and can interbreed to form a fertile offspring

Question 13

define population

Answer 13

a group of organisms of the same species that live in a particular place at a particular time and interbreeding can take place

Question 14

what is the contribution of variation that exist in crossing over

Answer 14

the exchange of genetic material during prophase 1 and leads to the formation of gametes with different gene combination

Question 15

what is the contribution of variation that exist in random arrangement of chromosomes

Answer 15

involves the random assortment of homologous chromosomes that pair at the equator during metaphase 1, leads to a greater variation in genes

Question 16

what is the contribution of variation that exist in mutation

Answer 16

occurs as a change in sequence of nucleotides in DNA this leads to change in the amino acid sequence of the protein synthesized

Question 17

what is the contribution of variation that exist in random mating

Answer 17

individuals within a population can mate randomly, this leads to variation of gene combination

Question 18

define discontinuous variation

Answer 18

those characteristics that fall into distinct categories

Question 19

define continuous variation

Answer 19

occurs when there is a range of phenotypes for the same characteristics

Question 20

what is the contribution of variation that exist in random fertilizers

Answer 20

sperm cells and egg cells are different from each other due to meiosis given that fertilization is random of these gametes .there will be different combinations of genetic material in the offspring