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After about how many years of the formation of the earth, life appeared on this planet?
Genetic Drift occurs due to :
Ernst Haeckel's embryological support for evolution was disapproved by:
Initiation codon in eukaryotes is:
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
Match List-I with List-II: List-I (Era) A. Mesozoic Era B. Proterozoic Era C. Cenozoic Era D. Paleozoic Era List-II (Dominant Life Forms) I. Lower invertebrates II. Fish & Amphibia III. Birds & Reptiles IV. Mammals
Mutations in plant cells can be induced by:
Variations caused by mutation, as proposed by Hugo de Vries, are:
The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called:
Identify the fossil of a man who showed the following characteristics: (A) Brain capacity of 1400 cc (B) Used hides to protect their body (C) Buried their dead bodies
The idea of mutations was brought forth by:
Match Column-I with Column-II.
Genetic drift operates in:
The eye of the octopus and the eye of the cat show different patterns of structure, yet they perform a similar function. This is an example of:
Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
Thorn of Bougainvillea and tendril of Cucurbita are examples of:
Which evolutionary phenomenon is depicted by the sketch given in figure?
In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 kg to 5 kg die. Which type of selection process is taking place?
Select the correct statement regarding the mutation theory of evolution:
Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.