Multiple Choice QuestionsPineapple (ananas) fruit develops from
a unilocular polycarpellary flower
a multipistillate syncarpous flower
a cluster of compactly borne flowers on a common axis
a cluster of compactly borne flowers on a common axis
Which one of the following statements is correct?
Neurons regulate endocrine activity, but not vice versa
Endocrine glands regulate neural activity, and nervous system regulates endocrine glands
Neither hormones control neural activity nor the neurons control endocrine activity
Neither hormones control neural activity nor the neurons control endocrine activity
Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?
Thiamine
Folic acid and cobalamine
Riboflavin
Riboflavin
D.
Riboflavin
Anaemia refers to any condition in which there is an abnormally low haemoglobin concentration and/or blood cell count. The most common cause is deficiency of iron which is an essential element of haemoglobin molecule.
Thus, the iron compounds in the diet will help to alleviate the symptoms of anaemia.
Thiamine (vitamin B1), deficiency causes beri-beri.
Riboflavin (vitamin B2) deficiency causes cheilosis and skin diseases.
In which of the following fruits is the edible part the aril?
Custard apple
Pomegranate
Orange
Orange
In photosystem-I, the first electron acceptor is
Ferredoxin
Cytochrome
Plastocyanin
Plastocyanin
Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they
act as replicons.
are RNA transcription initiator
help chromosome pairing
help chromosome pairing
Identify the odd combination of the habitat and the particular animal concerned
Dachigam National park - Snow Leopard.
Sunderbans - Bengal Tiger
Periyar - Elephant
Periyar - Elephant
A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?
AaBb
AaBB
AABb
AABb
Which one of the following ecosystem types has the highest annual net primary productivity?
Tropical rain forest
Tropical deciduous forest
Temperate evergreen forest
Temperate evergreen forest
The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
S-shaped or sigmoid growth of this insect
The food plants mature and die at the end of the rainy season
Its population growth curve is of J-type
Its population growth curve is of J-type
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