Which of the following is best method of germplasm conservation
Herbarium
Botanical garden
Seed bank
Zoological park
C.
Seed bank
Endangered plants may be preserved in part through seed bank or germplasm bank. The term seed bank sometimes refers to a cryogenic laboratory facility in which the seeds of certain species can be preserved for up to a century or more without losing their fertility. It can also be used to refer to a special type of arboretum where seeds are harvested and the crop is rotated. For plants that cannot be preserved in seed banks, the only other option for preserving germplasm is in vitro storage, where cuttings of plants are kept under strict conditions in glass tubes and vessels.
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.
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
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 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.
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.
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
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.
What is the characteristic of tapetum
It does not store food.
It is multi-nucleated.
It is multi-layered structure.
It nourishes the megaspore
