Evolution Test

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Evolution Test - 65

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Weekly Quiz Competition

Question 1
1 / -0

Major radiation of mammals, birds and pollinating insects took place in which epoch?

A
Oligocene

B
Eocene

C
Pliocene

D
Palaeocene

Solution

A.Oligocene - Early forms of amphicyonids, canids, camels, tayassuids, protoceratids, and anthracotheres appeared, as did caprimulgiformes, birds that possess gaping mouths for catching insects. Diurnal raptors, such as falcons, eagles, and hawks, along with seven to ten families of rodents also first appeared during the Oligocene.

B.Eocene - Eocene mammals included ancestral rhinoceroses, tapirs, camels, pigs, rodents, monkeys, whales, and the ancestral horse, eohippus, as well as animals such as the titano there, which have since become extinct.

C.Pliocene - allowing a number of terrestrial mammals including ground sloths, glyptodonts (large, armadillo-like, armoured animals), armadillos, opossums, and porcupines to appear

D.Palaeocene - Paleocene mammals included Cretaceous species such as opossum-like marsupials and, especially, the archaic and unusual multituberculates—herbivorous animals that had teeth very similar in some respects to those of the later, more advanced rodents.
So, the correct option is ‘Palaeocene’.
Question 2
1 / -0

Which of the following pair of mammal is not an example of convergent evolution?

A
Mole - Marsupial mouse

B
Anteater - Numbat

C
Lemur - Spotted cuscus

D
Lemur - Numbat
Question 3
1 / -0

Which of the following defines Hardy-Weinberg law?

A
$$p^2+3pq+q^2 = 1$$

B
$$p^2+2pq+q^2 = 1$$

C
$$p^2+2pq+q^2 = 0$$

D
$$p^2+q^2+2pq = 0$$

Solution

The Hardy-Weinberg law states that the genes and genotypic frequencies in a Mendelian population remain constant generation after generation if there is no selection, mutation, migration, or random drift.
It uses binomial expression $$p^2$$ + $$pq$$ + $$q^2$$ = 1 to calculate the genotypic and allele frequencies of a population.
$$p^2$$ = Percentage homozygous dominant individuals
$$q$$ = Frequency of the dominant allele
$$p^2$$ = Percentage homozygous recessive individuals
$$q$$ = Frequency of the recessive allele
$$2pq$$ = Percentage of heterozygous individuals
So, the correct answer is option B.
Question 4
1 / -0

Choose the correct answers from the alternatives given .
Which of the following is not a place where polymers may have arisen?

A
Hydrothermal vents

B
On rocks beside the sea

C
In clay

D
In the atmosphere

Solution

Polymers arose from clay form polymer clay materials, also they are formed in hydrothermal vents and in the rocks beside the sea where first monomers formed and then converted to polymers. So, the correct option is "in the atmosphere".
Question 5
1 / -0

Choose the correct answers from the alternatives given:
Which of the following is incorrectly matched?

A
Homo erectus made tools

B
Homo habilis controlled fire

C
Cro-magnon were good artists

D
Neanderthals were good hunters

Solution

Homo habilis lived in caves were herbivores and used tools of stones to dig out tubers and led community life. They are regarded as the last of the Australopithecus. They originated about 3.5 million years ago.
While Homo erectus were first to control fire and they lived around 1.7 million years ago.
Hence, the correct answer is 'Homo habilis controlled fire'
Question 6
1 / -0

Choose the correct answers from the alternatives given .
For an adaptive radiation to be successful

A
Transitional form must be provided physical access to the new environment

B
Transitional form must face high levels of competition in order to refine the adaptations that allowed it to enter the new environment

C
Invader organisms must have a design appropriate for the new environment

D
Both (b) and (c)

Solution

Adaptive radiation is the evolution of an animal or plant group into a wide variety of types adapted to specialized modes of life. This takes place when a species radiates to different geographical habitat and eventually get adapted to that habitat. This can only happen if due to high competition only those individual survive that are best adapted for that particular environment. In absence of organisms incapable of adapting for e.g. if their body design does not suit new habitat, they will eventually get extinct.
So, the correct option is 'Both (b) and (c)'.
Question 7
1 / -0

In a random mating population frequency of dominant allele is 0.7. What will be the frequency of homozygous dominant phenotype?

A
0.49

B
0.09

C
0.3

D
0.21

Solution

It is given that, the population frequency of dominant allele (p) is 0.7. Hence, the population frequency of recessive allele (q) will be 1 - 0.3 = 0.7.
We know that p$$^2$$ + 2pq + q$$^2$$ = 1, where p$$^2$$ is frequency of homozygous dominant phenotype, 2pq is frequency of heterozygous dominant phenotype and q$$^2$$ is frequency of homozygous recessive phenotype.
Hence, frequency of homozygous dominant phenotype (p$$^2$$) will be 0.7$$^2$$ = 0.49.
Thus, the correct answer is '0.49.'
Question 8
1 / -0

Which of the following animals show adaptive radiation based on locomotion?

A
Scorpion, elephant, human

B
Cheetah, kangaroo, mole

C
Praying mantis, seal, python

D
Cockroach, squirrel, toad

Solution

In developmental science, versatile radiation is a procedure in which life forms expand quickly from a genealogical species into a large number of new structures, especially when an adjustment in nature makes new assets accessible, makes new difficulties, or opens new ecological specialties. precedents incorporate Australian marsupials, cichlid fish, and Darwin's finches.
So, the correct option is 'Cheetah, kangaroo, mole'.
Question 9
1 / -0

In the population of $$50,000$$ individuals, if the frequency of recessive allele for a character is $$40\%$$, then find the number of organisms having dominant character :-

A
$$30,000$$

B
$$4200$$

C
$$42,000$$

D
$$36,000$$
Solution
Correct Option: A
Explanation:
50,000 people in total.
The frequency of recessive allele character in the general population is 40% of the overall population
$$ = \dfrac{{40}}{{100}} \times 50000$$
$$ = 20,000$$
Number of dominant-character organisms = total population - recessive-character organisms
$$= 50,000-20,000$$
$$= 30,000$$
Hence, the number of organisms having dominant character is $${\mathbf{30,000.}}$$
Question 10
1 / -0

Which is the correct sequence of cranial capacities according to increasing manner?

A
Australopithecus - Homo erectus - Cro magnon man - Neanderthal man

B
Homo erectus Ramapithecus Homo habilis Neanderthal man

C
Australopithecus - Homo habilis - Homo erectus - Neanderthal man

D
Cro-Magnon man - Dryopithecus - Heidelberg man - Neanderthal man

Solution

The cranial capacity of the human ancestors are as follow-
Australopithecus- 450-600 ml
Homo erectus-940 cc
Cromagnon man- 1600 cc
Neandertal man- 1660 cc
Homo habilis-1300 cc
Dryopithecus- not known exactly. But the least among any ancestry.
Heidelberg man-1350 cc
So, the correct option is 'Australopithecus - Homo erectus - Cro magnon man - Neanderthal man'

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Re-Attempt Weekly Quiz Competition

Evolution Test - 65

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Evolution Test - 65

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SHARING IS CARING

Question 1

Oligocene

Eocene

Pliocene

Palaeocene

Solution

Question 2

Mole - Marsupial mouse

Anteater - Numbat

Lemur - Spotted cuscus

Lemur - Numbat

Question 3

$$p^2+3pq+q^2 = 1$$

$$p^2+2pq+q^2 = 1$$

$$p^2+2pq+q^2 = 0$$

$$p^2+q^2+2pq = 0$$

Solution

Question 4

Hydrothermal vents

On rocks beside the sea

In clay

In the atmosphere

Solution

Question 5

Homo erectus made tools

Homo habilis controlled fire

Cro-magnon were good artists

Neanderthals were good hunters

Solution

Question 6

Transitional form must be provided physical access to the new environment

Transitional form must face high levels of competition in order to refine the adaptations that allowed it to enter the new environment

Invader organisms must have a design appropriate for the new environment

Both (b) and (c)

Solution

Question 7

0.49

0.09

0.3

0.21

Solution

Question 8

Scorpion, elephant, human

Cheetah, kangaroo, mole

Praying mantis, seal, python

Cockroach, squirrel, toad

Solution

Question 9

$$30,000$$

$$4200$$

$$42,000$$

$$36,000$$

Solution

Question 10

Australopithecus - Homo erectus - Cro magnon man - Neanderthal man

Homo erectus Ramapithecus Homo habilis Neanderthal man

Australopithecus - Homo habilis - Homo erectus - Neanderthal man

Cro-Magnon man - Dryopithecus - Heidelberg man - Neanderthal man

Solution

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