Biology - Online Test
Q1. In Barley stem, vascular bundles are
Answer : Option B
Explaination / Solution:
The vascular bundles in Hordeum vulgare (barley) plant are scattered in ground tissues, many in number and vary in size-smaller towards periphery and bigger towards centre of the ground tissue, oval or rounded in outline, conjoint, collateral and closed.
Q2. Which is the incorrect statement from the following?
Answer : Option D
Explaination / Solution:
Lion (Pantheraleo), leopard (P. pardus) and tiger (P. tigris) with several common features, are all species of the genus Panthera. The genus Felisincludes cats. Hence, the correct option is Lion, tiger, leopard and cat belong to the same genus.
Q3. The mature seeds of plants do not possess endosperm because
Answer : Option D
Explaination / Solution:
The mature seeds of plants do not possess endosperm because, it gets used up by the developing embryo during seed development.
Q4. Kinetin was identified by
Answer : Option A
Explaination / Solution:
The discovery of Kinetin is comparatively more recent. Its credit goes to Miller et al (1955) who were working in Prof. Skoog’s laboratory at the University of Wisconsin on the growth of tobacco pith callus in culture and wanted it to grow indefinitely.
Q5. Select the wrong pair of vegetative propoagules from the following pairs?
Answer : Option B
Explaination / Solution:
The wrong pair of vegetative propoagules is rhizome-potato. Potato is grown vegetatively by eyes present on underground modified tubers. Vegetative propagation is a mode of asexual reproduction.
Q6. Transducers is the term used for
Answer : Option A
Explaination / Solution:
Transducers are those organisms that convert one form of energy to another form. Green plants converts solar energy into chemical energy in foods by the process of photosynthesis.
Q7. Sachin suffers from hypoparathyroidism. This can lead him to :
Answer : Option A
Explaination / Solution:
Hypoparathryrodism is the condition in which body secretes abnormally low level of parathyroid hormone. This deficiency may lead to hypocalcemia and tetany.
Q8. Mobile genetic elements that replicate an RNA intermediate are called as
Answer : Option A
Explaination / Solution:
Mobile genetic elements that replicate an RNA intermediate are called transposons. It is a small piece of DNA that inserts itself into another place in the genome.
Q9. Identify mechanical contraceptive in figure below
Answer : Option A
Explaination / Solution:
Female condom is a mechanical contraceptive similar to condom used by male. It prevents the meeting of ovum with sperm as well as provide protection against STDs.
Q10. Largest single mass of lymphatic tissue in the body is
Answer : Option D
Explaination / Solution:
Spleen is the largest single mass of lymphatic tissue in body. Blood formation in foetus and newly born child takes place in spleen.
