Biology Ch5 And 6

Question 1

5.1) function of DNA

Answer 1

carries the information for inherited characteristics

Question 2

5.1) chromosomes

Answer 2

thin threads containing DNA found in the nucleus of all cells

Question 3

5.1) 23 (single chromosomes)

Answer 3

in humans, the number of chromosomes in the nucleus of each sex cell

Question 4

5.1) Genotype

Answer 4

the information for the hereditary characteristics in an organism

Question 5

5.1) phenotype

Answer 5

the external appearance (visible characteristics) of an organism

Question 6

5.1) 46 (23 pairs)

Answer 6

in humans, the number of chromosomes in the nucleus of each body cell

Question 7

5.2) gene

Answer 7

part of a chromosome that contains the information for a single hereditary characteristic

Question 8

5.2) allele

Answer 8

one of the genes of a gene pair (allele pair)

Question 9

5.2) DNA sequence of a gene

Answer 9

the building blocks of DNA (A, C, T, G) occur in a specific order, one after the other

Question 10

6.1) ecosystem

Answer 10

a certain area in which the biotic and abiotic factors form a unit

Question 11

6.1) individual

Answer 11

one single organism

Question 12

6.1) community

Answer 12

all the populations that live in an ecosystem

Question 13

6.1) abiotic factors

Answer 13

influences on organisms from non-living aspects of nature

Question 14

6.1) biotope

Answer 14

the sum of the abiotic factors in an ecosystem

Question 15

6.1) biotic factors

Answer 15

influences on organisms from living

Question 16

6.2) decomposers

Answer 16

organisms that break down dead organisms and their waste

Question 17

6.2) food web

Answer 17

all the feeding relationships in an ecosystem

Question 18

6.2) food chain

Answer 18

a series of organisms, whereby each subsequent organism is the food source for the next organism

Question 19

6.2) producers

Answer 19

organisms that provide food for all other organisms

Question 20

6.2) consumers

Answer 20

organisms that eat the materials made by plants

Question 21

6.4) pyramid of numbers

Answer 21

shows the number of organisms in each link of a food chain

Question 22

6.4) biomass

Answer 22

the total weight of all energy-rich compounds

Question 23

6.4) pyramid of biomass

Answer 23

shows the amount of biomass contained in each level of a food chain