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Which one of the following statements about human sperm is correct?
1. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
2. The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
3. Acrosome serves as a sensory structure leading the sperm towards the ovum
4. Acrosome serves no particular function.
The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
Dispersal of Seeds A plant usually bears many fruits and innumerable seeds. If all the seeds produced by a plant were to germinate in the immediate vicinity, this will have s
peptide bond
Q. How is the depolarization of the neuronal plasma membrane generated? How does the cell return to its original rest? When the neuron receives a stimulus by the permeability o
What is vaso constriction
BASICS OF ENVIRONMENT We live in two world one is natural world of animals, plants, air, water and soil that was present since the evolution of earth. The other world is of soc
What is the energy efficiency of photosynthesis? a) What area is occupied by each molecule? b) Calculate the molecular absorption cross section in units of A 2 A cr
Early campaigns of the 19th century that focused on sanitation, hygiene, housing, and nutrition had little effect in controlling communicable disease due to flawed rationale based
Biotechnology: Biotechnology is, perhaps. best defined as the industrial utilisation of biological systems or processes. In sense, therefore, biote(biology ha existed fo
TYPES OF CLEAVAGE - Depending upon the distribution & amount of yolk, cleavage is of following types - 1 . HOLOBLASTIC EQUAL CLEAVAGE ( holos , whole ; blastos, ger
(a) Bedroom : · Do not place room heaters near any inflammable materials. · Do not use heaters
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