Does Pennatula Exhibit Metagenesis?
Pennatula is a genus of sea pen. Pennatula does not show metagenesis. Sea pens are colonial and are present in... View Article
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What are the Various Sources of Water?
Water is a natural resource and we cannot imagine our lives without it. Quite a few of our daily chores... View Article
In angiosperms, all the four microspore tetrads are covered by a layer which is formed by
a)Callose b)Pectose c)Sporopollenin d)Cellulose Answer: a) Callose Explanation: Callose is a plant polysaccharide. It forms a layer around the reproducing... View Article
In ferns, the sex organs are produced on
a) Protonema b) Sporophyll c) Sporangium d) Prothallus Answer: d) Prothallus Explanation: In ferns, both the sex organs, that is,... View Article
In humans what percentage of body weight is contributed by muscles?
a) 70-80% b) 20-30% c) 40-50% d) 60-70% Answer: c) 40-50% Explanation: The average muscle mass of a human body... View Article
Which of the following does not occur in the S phase of cell cycle?
a) DNA replication b) Histone synthesis c) Nucleosome replication d) Nuclear Division Answer: d) Nuclear division Explanation: S phase is the... View Article
Who proposed the double helix structure of DNA and when?
a) Watson and Crick, 1953 b) Hershey and Chase, 1952 c) Avery, McCarty and MacLeod, 1944 d) Griffith, 1928 Answer:... View Article
What is a Lax Sporophyll?
A leaf, which bears spores is called sporophyll. The spores can be megasporophylls or microsporophylls. The sporophylls aggregate to form... View Article
The lever mechanism or turn pipe mechanism for pollination is a characteristic feature of
a) Salvia b) Helianthus c) Ranunculus d) Macadamia Answer: a) Salvia Explanation: The Salvia species has adapted to a special mechanism... View Article
Linked genes separate due to
a) Mutation b) Crossing over c) Recombination d) None of the above Answer: b) Crossing over Explanation: Genes that are... View Article
Blood cells when kept in a liquid start shrinking. What type of a solution might it be?
a) Hypotonic solution b) Hypertonic Solution c) Isotonic solution d) None of the above Answer: b) Hypertonic Solution Explanation: If... View Article
State a list of Non-poisonous Snakes.
Snakes are a reptilian species that are often misunderstood. While the majority of the snake species are poisonous, some are... View Article
What is the template independent enzymatic synthesis of RNA?
RNA synthesis usually occurs in the cells using DNA as a template in the presence of a certain set of... View Article
Explain the Ultrastructure of Myofibrils.
A muscle cell is made up of a number of fibres known as muscle fibres. These muscle fibres have rod-like... View Article
We have a moral duty to care for biodiversity. Explain with reasons.
Biodiversity reflects the health of our planet Earth. It shows how well synchronised we are with other species and organisms.... View Article
Malpighian tubules remove excretory matter from the
a) Hemolymph b) Alimentary canal c) Both a and b d) None of the above Answer: a) Explanation: Malpighian tubules... View Article
Select the correct option with respect to wheat
a) Genus: Triticum, Family: Poaceae, Order: Poales, Class: Monocotyledonae b) Genus: Triticum, Family: Poaceae, Order: Poales, Class: Dicotyledonae c) Genus:... View Article
The ploidy of capsule, seta and rhizoids respectively in Funaria is
a) 2n, n, 2n b) 2n, n, n c) 2n, 2n, n d) 2n, 2n, 2n Answer: c) Explanation: Funaria... View Article
The pollen chambers present in gymnosperms represent
a) The microsporangium in which pollen grains develop b) An opening in the megagametophyte through which pollen tube approaches the... View Article
Position of protoxylem and protophloem in leaf, respectively, is
a) Abaxial and adaxial b) Adaxial and abaxial c) Both abaxial d) Both adaxial Answer: b) Explanation: The protoxylem is... View Article
