Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Evolution Test - 47

Result Self Studies

Evolution Test - 47
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Hummingbirds and hummingbird hawk moth describes
    Solution
    Hummingbirds evolved on a particular energy-source: Nectar. However, they need this to sustain that metabolism. When they rest or food is not readily available, hummingbirds go into torpor. Hummingbird Hawk-moth has evolved off the same high-sugar diet of Nectar and has settled on the same strategy.  Convergent Evolution is when two species that are not recent 'relatives' on the species-level, evolve similar features or solutions independently. 
    So, the correct answer is "Convergent evolution".
  • Question 2
    1 / -0
    The first organisms on primitive earth were ___________.
    Solution
    The first organisms on primitive earth were heterotrophic and anaerobic.
    In primitive earth, the oxygen was limited. The modern organism has a similar structure to that of the ancient organisms. Photosynthesis is first found in those organisms which are rich in oxygen. They are heterotrophic. Example Cyanobacteria.

    Hence, option B is correct.
  • Question 3
    1 / -0
    The ancestors of modern day frogs and salamanders are
    Solution
    • Evolution brings gradual morphological changes. 
    • The discovery of Coelacanth (lobe fins), first amphibians is significant as they prove that amphibians have evolved from fish-like organisms. 
    • Lobe fish were the ancestors of modern-day frogs and salamanders.
    • Thus, the correct answer is option B.
  • Question 4
    1 / -0
    Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination and.
    Solution
    • The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences.
    • When mating is random in a large population with no disruptive circumstances, both genotype and allele frequencies will remain constant because they are in equilibrium. 
    • Any factor, which can disturb the alleles in a population is likely to affect the Hardy-Weinberg equilibrium. 
    • The alleles in a population can be altered by mutation, migration, genetic drift, recombination, and natural selection. Hardy-Weinberg equilibrium is not effected by evolution, limiting factors, saltation and over prediction
    So, the correct answer is 'Natural selection'.

  • Question 5
    1 / -0
    Which of the following is the most primitive ancestor of man?
    Solution
    Correct option: A
    Explanation:

    • Ramapithecus was the most primitive hominid; known from India and East Africa in Late Miocene or Early Pliocene time (about 14 million years ago). 
    • Ramapithecus was the earliest known hominid, some 5 or 6 times older than the oldest Pleistocene hominids.
    • The remains of Ramapithecus resemble closely the equivalent parts of the later Hominidae suggesting that they were the beginning of the lineage leading to humans.
  • Question 6
    1 / -0
    Wings of pigeon, bat and mosquito shows
    Solution
    Convergent evolution refers to the kind of evolution wherein organisms evolve in the analogous structures or functions in spite of their evolutionary ancestors being very dissimilar or unrelated. Here, the wings of bats, birds, and insects evolved independently from each other i.e, their ancestors are different, but all are used to perform the function of flying. 
    So, the correct answer is option B.
  • Question 7
    1 / -0
    The formation of two species from one ancestral species is known as
    Solution
    Divergent evolution is caused when the differences in the groups lead to the formation of new species. Due to the divergent evolution, the structures with the common origin develop differently according to the environmental need. Darwin's finches provide a good example of divergent evolution. So, the correct answer is option B.

  • Question 8
    1 / -0
    The direct evidence for evolution is
    Solution
    Fossils are the preserved remains of previously living organisms or their traces, dating from the distant past. Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet's history. 
    So, the correct answer is 'Fossil record'.
  • Question 9
    1 / -0
    The most recent and direct pre-historic ancestor is
    Solution
    • The Cro-Magnon man appeared during the Holocene period, with the largest cranial cavity, reduced jaws and omnivorous.
    • These were the first early modern humans of the European, so they are considered as the direct ancestor of modern man.
    • Cro-magnon was an excellent toolmaker and a fine artist as they drew pictures in their caves.
    • They were first to domesticate dogs. They were also religious.
    Thus, the correct answer is option A.
  • Question 10
    1 / -0
    In a large isolated population, alleles p and q at a locus are at Hardy Weinberg equilibrium. The frequencies are p = 0.6 and q = 0.4. The proportion of the heterzygous genotype in the population is :
    Solution
    Using the Hardy-Weinberg equation this problem can be solved.
    $$q^2$$ represents the frequency of homozygous recessive organisms
    As q= 0.4, $$q^2$$  = 0.16. 
    p + q = 1
    1 - 0.4 = p, hence p = 0.6.
    So the frequency of homozygous dominant organisms $$p^2$$  = 0.36.
    The frequency of heterozygous plants is given by (2pq). Hence 2(0.6)(0.4) = 0.48. 
    Thus, the correct answer is option C.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now