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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
Briefly explain what is The Leaf? In a typical dicot, leaf primordia arise from the apical meristem, which is housed within the terminal bud on a shoot. The leaf cells are produc
What are the genotypes and respective blood types of the ABO system? Since the alleles are IA, IB and i the possible genotypes are IAIA (blood type A), IAIB (blood type AB), IB
Nine-year-old Alek is admitted to the emergency room with a closed fracture of the right femur. Radiography revels that the fracture crosses the distal epiphyseal plate. What conce
Define Importance of Nutrient and Drug Interaction? Certain foods, beverages, alcohol, caffeine, and even cigarettes can interact with medicines. This may make them less effect
INCOMPLETE DOMINANCE (1:2:1) Sometimes two genes of allelomorphic pair do not show dominant-recessive relationship, but when present simultaneously (or come together), they sho
Explain Pancreatitis Pancreatitis :- Inflammation of the pancreas.
Describe in brief about retina The retina is a highly complex layer of nervous tissue. The photoreceptors are rods and cones for scotopic and photopic vision respectively. The
Q How does the presence of exoskeleton describe the general small size of arthropods? Since they have periodic ecdysis and exoskeleton, the growth of arthropods is limited to a
Are the alleles of a gene essentially originated one from the father and the other from the mother? Are there exceptions? It is natural so that alleles have come one from the m
why does an organism internal environment change
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