Biology - Online Test
Q1. Phytochrome is sensitive to
Answer : Option C
Explaination / Solution:
Phytochrome is a photoreceptor and a pigment that plants, and some bacteria and fungi, use to detect light. It is sensitive to light in the red and far-red region of the visible spectrum.
Q2. Sparrow is
Answer : Option B
Explaination / Solution:
Sparrow feeds on fruits as well insects. Herbivores or plant eaters are primary consumer and carnivores that feed on herbivores are secondary consumer. So, Sparrow occupy both primary and secondary trophic levels.
Q3. The parietal placentation is seen in
Answer : Option A
Explaination / Solution:
In parietal placentation, the ovules develop on the inner wall of the ovary or on peripheral part. Ovary is one-chambered but it becomes two chambered due to the formation of the false septum, e.g., mustard and Argemone.
Q4. alpha endotoxins are formed by
Answer : Option B
Explaination / Solution:
Alpha endotoxins are formed by sporulation. Alpha endotoxins are known to be frequent contaminants in plasmid DNA extracted from bacteria.
Q5. Lactational amenorrhea method of natural contraception is effective up to
Answer : Option C
Explaination / Solution:
Lactational amenorrhea means absence of menstrual cycle during instance lactational period after the parturition. This method is reported to be useful up to six months of parturition.
Q6. The mouth part of cockroach which is compared to tongue is
Answer : Option A
Explaination / Solution:
A median flexible lobe called as hypopharynx act as tongue. It lies within the cavity enclosed by the mouth parts.
Q7. A peculiar group of dual organism which are formed by an association between an algae and a fungus.
Answer : Option C
Explaination / Solution:
A lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi in a symbiotic relationship. The combined lichen has properties different from those of its component organisms.
Q8. The ingredient not used for preserving food stuff is
Answer : Option A
Explaination / Solution:
For preserving food stuff vinegar, salt and sugar is used. Ethanol is antiseptic in nature but not used for preserving food stuff.
Q9. The mature seed that do not contain residual endosperm is called
Answer : Option B
Explaination / Solution:
The mature seeds may contain residual endosperm or get endosperm consumed completely during the embryological development. The seeds without endosperm are called non-albuminous seeds.
Q10. A gut parasite will not need
Answer : Option B
Explaination / Solution:
The parasite obtaintheirfood from host body. Gut parasite like round worm and tap worm absorbed digested food from our body. They do not require alimentary canal as they absorb digested food.
