Monarch butterfly escapes from predators by

• foul smell

• bitter taste

• colour combination

• rough skin

Which of the following is best method of germplasm conservation

• Herbarium

• Botanical garden

• Seed bank

• Zoological park

Which of the following is correct

• Henking discovered the small Y-chromosome.

• Drosophila also shows XX-XY sex determination like human.

• Birds have ZZ-ZW sex determination, where females are ZZ & males are ZW.

• Grasshoppers show XX-XY sex determination

Which of the following statements is correct

• Monkey, apes and humans exhibit estrous cycle.

• Urine is pale yellow and slightly alkaline.

• Lots of enzymes are present in bile juice.

• Ovulation in humans is spontaneous.

Assertion: Amount of organic biodegradable compounds present in water is measured by the BOD of that water.

Reason: During biodegradation of biodegradable organic compounds, oxygen is released by bacteria

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Which one of the following options is a correct match of phenomenon and its explanation

• Reverse Transcription PCR - Many copies of a DNA sequence.

• Central dogma - RNA > DNA > Protein > RNA.

• RNA silencing - Use of ds-RNA to stop the expression of ss-RNA.

• Transcription- Process of formation of RNA & proteins.

What is the characteristic of tapetum

• It does not store food.

• It is multi-nucleated.

• It is multi-layered structure.

• It nourishes the megaspore

In assisted reproductive technology where gametes have been fertilized in vitro, which of the following is practicable for embryo transplantation in Fallopian tube

• Only embryo up to 8 blastomeres if zygote is not transplanted.

• Only zygote is transplanted not embryo

• Either embryo or zygote with 8 blastomere phase transplanted

• Morulla with 8-24 celled stage is transplanted in Fallopian tube.

In vehicles, catalytic converters are used

• to increase mileage of vehicles

• to convert CO₂ into carbonates

• to increase the efficiency of lead mixed petrol

• to convert CO to CO₂

Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters

• Absence of limbs in snakes

• Melanization in peppered moth

• Presence of webbed toes in aquatic birds

• Lack of pigment in cave-dwelling animals