Question

please answer all is due an hour please all

Higher levels of magnesium inside the cell is maintained by

Question 17 options:

a)	facilitated diffusion

b)

osmosis

c)	active transport

Question 18 (1 point)

Genetic diversity is increased by

Question 18 options:

a)	cross-over

b)	sexual reproduction

c)

mutation

d)	all of the above

Question 19 (1 point)

A cell placed in a solution hypotonic to it will

Question 19 options:

a)

swell

b)

crenate

c)	do nothing

Question 20 (1 point)

Carbon forms the backbone of the molecules that comprise plant tissue. This carbon comes from

Question 20 options:

a)	the soil and was taken up through the plant roots

b)	photosynthesis; CO2 was made by the plant during photosynthesis

c)	the atmosphere in the form in CO2

d)	the hydrolysis of carbohydrates in the plant

Question 21 (1 point)

Divergent evolution

Question 21 options:

a)	is more common than convergent evolution

b)	results in organisms that are less alike as time goes on

c)	can be seen in a wide variety of habitats

d)	is characterized by all of these statements

Question 22 (6 points)

Match each of the following. Each answer is used only once.

Question 22 options:

123456	large geographic regions characterized by a specific set of biotic and abiotic factors
123456	the physical space a specific organism occupies
123456	the role an organism plays in the environment
123456	individuals of the same species living in a specific area
123456	a group of organisms which are more sensitive to environmental change than other organisms in the area
123456	all the organisms interacting in a specific area

1.	population
2.	community
3.	habitat
4.	biome
5.	niche
6.	indicator species

Question 23 (1 point)

The chromatin condenses, spindle fibres begin to form, and the nuclear membrane disintegrates during

Question 23 options:

a)

telophase

b)

prophase

c)

anaphase

d)

metaphase

Question 24 (1 point)

The chromosomes line up in the middle of the cell during

Question 24 options:

a)

prophase

b)

telophase

c)

anaphase

d)

metaphase

Question 25 (1 point)

Moderate rainfall and snow, boggy areas, cooler temperature, and conifers are characteristic of

Question 25 options:

a)

taiga

b)

tundra

c)

desert

d)	temperate deciduous forest

Question 26 (1 point)

Carbon usually forms

Question 26 options:

a)	ionic bonds

b)	covalent bonds

Question 27 (1 point)

Nitrogen has an atomic number of 7 and an atomic weight of 15. It has

Question 27 options:

a)

8 protons

b)	15 protons

c)	22 neutrols

d)	8 neutrons

Question 28 (1 point)

In mitosis, if a parent cell has 16 chromosomes, each daughter cell will have how many chromosomes?

Question 28 options:

a)

64

b)

32

c)

16

d)

8

Question 29 (1 point)

Natural selection gradually results in a species that is

Question 29 options:

a)	more intelligent

b)	physically bigger

c)	more adapted to survival and reproduction in its environment

d)	less aggressive

Question 30 (1 point)

CRISPR is

Question 30 options:

a)	a methods of causing random mutations

b)	a very precise method for adding new genes to the chromosomes in a specific location

c)	an organic end product of anaerobic respiration

d)	one of the substrates in fermentation reactions

Answer 1

Answer 17- Option(c) active transport . Magnesium transportation occurs via two process- 1) with the help of channel 2) with the help of H+ ATPase. Answer 18 Option(d) all of the above. In sexual reproduction chromosome from two different individual combine so new combinations are created. Similarly exchange of genetic material occurs in crossing over, hence variation is added. Answer-19 Option( a) swell. Answer -20 Option(c) the atmospheric carbon dioxide is fixed in dark reactio forms the backbone of plant tissue. Answer-23- Option(b) prophase. Answer 24- Option (d) metaphase. Answer 25 - Option(b) tundra. Answe 26- Option (b) covalent bond. Answer 27- Option( d) 8 neutron. Answer 28 - Option( c) 16 because in mitosis same number of chromosome is found in daughter cell. Answer 29 -Option( c) Answer- 30 Option (b)