Question

please do allis due in an hour, please all

"Survival of the fittest" refers to

	a hierarchical series of changes in living organisms leading to the best, most developed species on Earth
	the concept that individuals in a species that are most adapted to the environment are able to survive and reproduce
	Individuals that exercise to become fit are the most evolved
	None of the above.

Question 2 (1 point)

New genetic combinations result from

Question 2 options:

	a) cross over
	b) sexual reproduction
	c) mutations
	d) all of the above

Question 3 (1 point)

A and B are codominant over O. Susan, a mother with type B blood, has a child with type O blood. She claims that Craig, who has type A blood, is the father. He claims that he cannot possibly be the father. Further DNA tests ordered reveal that Craig is AA. Assuming no spontaneous mutations occur, this indicates

Question 3 options:

	a) Susan is right and Craig is the biological father
	b) Craig is right and cannot be the biological father
	c) It is impossible to reach a decision based on the limited data available.

Question 4 (1 point)

Colorblindness is an X-linked recessive trait. A woman heterozygous for color-blindness marries a man with normal vision. The potential children are

Question 4 options:

	a) all colorblind daughters and normal sons
	b) all colorblind sons and normal daughters
	c) all normal children
	d) all normal daughters, half normal sons, and half colorblind sons

Question 5 (1 point)

Primary consumers are also known as

Question 5 options:

	a) scavengers
	b) herbivores
	c) decomposers
	d) carnivores

Question 6 (1 point)

Organisms that produce organic material from
inorganic matter are:

Question 6 options:

	a) decomposers
	b) consumers
	c) producers
	d) carnivores

Question 7 (1 point)

Two species in one habitat can coexist if they

Question 7 options:

	a) differ in their use of resources
	b) share the same resources in different ways
	c) use the same resources at different times
	d) all of the above

Question 8 (1 point)

In which one of the following biomes would you expect decomposers to work most rapidly and efficiently?

Question 8 options:

	a) tundra
	b) tropical rain forest
	c) grassland
	d) taiga (boreal forest)
	e) desert

Question 9 (1 point)

Floods are a

Question 9 options:

	a) density independent factor
	b) density dependent factor

Question 10 (1 point)

The maximum number of individuals sustainable by an environment's resources is its

Question 10 options:

	a) biotic potential
	b) limiting factor
	c) carrying capacity

Question 11 (1 point)

An organism's biotic potential is the maximum number of offspring

Question 11 options:

	a) its habitat can support
	b) it produces at one time
	c) that it can produce given ideal conditions of plentiful resources
	d) that survive to adulthood

Who will get more energy from a kilogram of grain?

Question 12 options:

	a) The vegetarian who eats the grain
	b) The farmer who feeds the grain to his chicken and then eats the chicken
	c) The fisherman to feeds the grain to the little fish that are then eaten by bigger fish which he catches and eats
	d) All three will get the same amount of energy from the grain

If the results of an experiment contradict the hypothesis, you have

	a) not followed the instructions correctly
	b) shown the hypothesis is false, which is OK
	c) collected only anecdotal evidence
	d) designed the experiment poorly

A hawk nests in an apple tree and hunts the evil little mice who are nibbling on the tree. This relationship between the tree and the hawk is

	a) mutualism
	b) predation
	c) commensalism
	d) parasitism

If a person has the genotype Aa, the individual is

	a) homozygous dominant
	b) homozygous recessive
	c) heterozygous

An organism which has a nucleus, endoplasmic reticulum, and golgi complexes is

	a) eukaryotic
	b) prokaryotic

Answer 1

Ans-

1- the concept that individuals in a species that are most adapted to the environment are able to survive and reproduce.

2- all of the above .

3- option b - craig is right and cannot be the biological father .

As parents - OO. X AA

F1-

	O	O
A	AO	AO
A	AO	AO

There is only one possibility that the their child will be type A blood group.

4- d- all normal daughters ,half colour blind sons and half normal sons.

5- option c herbivores.

Primary consumers are second trophic level and consume orimary oroducers which are plants . So they are herbivores.

6- Option a - decomposers.

Decomposers are organisms that convert inorganic compounds from dead and decaying matter to organic matter which is beneficial to the ecosystem. Mostly includes bacteria.

7- option a - differ in their use of resources.

If two species require the same resources ,it will result in competition,and the better competitor sustains while the other species will perish.

8- option b - tropical rain forest.

9- option a - density independent factor.

Density independent factors are natural calamities such as fire, flood , draught etc these factors influence the population size.

10- option c - carrying capacity.

11- option c -that it can produce given ideal conditions of plentiful resources.

12- option a - the vegetarian who eats the grain .

A vegetarian eating the grain is a primary consumer , as the trophic levels increase the energy flow decreases , at the highest triphic level ,the energy will be the lowest .

13-option-b)-shown the hypothesis is false, which is OK.

Hypothesis is just a supposition before conducting an investigation to prove or disprove it based on sufficient evidence .

14. A - mutualism

It can be either mutualism or commensalism . In mutualism both interacting species is benefitted and in commensalism on is benefitted and the other is neither harmed nor benefitted. The tree here is not particularly benefitted . But it says nibbling on the tree . So it can be a benefit also.

15- option c - Heterozygous

Heterozygous genotype is when a gene fontains dissimilar alleles , that is a dominant allele and a recessive allele.

16- option a- eukaryotic .

Eukaryotic organisms contain membrane bound cell organelles which are lacking in prokaryotes.

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