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Following is the diagrammatic representation of TS ofgut.
Which region of this structure modify to make g gastroesophagealsphincter?
Muscularis externa (circular muscle) modify to make s sphincter.
Assertion (A) , Reason (R) type questions A : Thick layers of muscles are present in the wall of alimentary canal. R : These muscles help in the mixing of food materials with the enzymes coming from different glands in the alimentary canal.
Alternative forms of a gene are called
An alternative form of a gene is known as an allele. Alleles vary in their sequence which may or may not result in a variant phenotype of a particular trait. Alleles represent variations of a gene that is responsible for a particular trait. eg: ABO blood groups in humans are a good example of multiple alleles.
Heredity or inheritance of specific traits became clearer due to
Gregor Mendel's work on garden peas laid the foundation for understanding the inheritance of specific traits. His experiments and subsequent laws of inheritance explained how traits are passed from parents to offspring, making heredity clearer.
Which of the following sentences is true about the evolutionary process?
Microevolution takes place due to
Microevolution refers to small-scale changes within a species, primarily due to genetic variations that occur at the level of genes (blastogenic variation). These genetic changes can lead to differences in traits within a population.
The difference between Homo sapiens and the Homo erectus was
The primary difference between Homo erectus and Homo sapiens is in the size of their brains. Homo erectus had a smaller brain relative to Homo sapiens. This difference is significant in terms of the cognitive and technological advancements that are attributed to Homo sapiens.
By studying analogous structures we look for
Analogous structures are those that have similar appearance and function but different underlying structures. This occurs due to convergent evolution, where unrelated species evolve similar traits independently, usually as a result of having to adapt to similar environments or ecological niches.
__________- was a predecessor of Darwin and he developed the theory of acquired characteristics.
Jean-Baptiste Lamarck was a predecessor of Darwin who developed the theory of acquired characteristics. According to Lamarck, traits acquired by an organism during its lifetime could be passed on to its offspring. This theory was later refuted by the understanding of genetics and inheritance.
Which of the following are not the examples of analogous structures?
Analogous structures are those that perform the same function but have different evolutionary origins. The wings of a bat and the forelimb of cattle are examples of homologous structures, which share a common ancestry but may perform different functions. On the other hand, the wings of a bat and a butterfly are analogous as they perform the same function (flying) but have evolved independently.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.