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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
Signify the term - Proglottids? Serially repeating segment like structures found in tapeworms which contain reproductive organs. Immature proglottids are continually added at t
Describe the Complete transposition of great arteries ? Lethal, relatively frequent malformation. Without treatment, it results in 30 per cent mortality within the first week o
Explain Karyotype - Animal Taxonomy? In animals systematic, it is the karyotype, that is the chromosome number and structure which are used quite extensively either separately
Life forms are significant because
Q. What is Acid cleaning compounds? Acid-based cleaners like phosphoric acid and hydrofluoric acid are commonly used. They are very useful in removing minimal scales that
Copulation and Fertilisation in Hermaphrodites Copulation between hermaphrodites is common. Flatworms possess a cirrus and penis that is inserted into the uterine vaginal ope
Describe how the International Astronomical Union defines a planet. Also include why Pluto is no longer considered a planet.
Cobalt Cobalt functions as a component of vitamin B12 (cobalamin). Ruminants are not dependent on a dietary source of vitamin B12 because ruminal microorganisms can synthesize B
why succession more likely to occur on valley floor than steep slopes
Describe how the structure of chromatin and chromosomes facilitates the following functions: a) DNA packaging. b) Regulation of gene expression. c) Replication at the
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