Which type(s) of genetic transfer lead to incorporation of new DNA into the bacterial chromosome?

I. Conjugation mediated by F factor

II. Hfr mediated conjugation

III. Transduction

IV. Transformation

#Question id: 6968

#SCPH06 I Botany

In Xenopus, the mesoderm moves in through the blastopore by rolling around the dorsal lip in a process called:

#Question id: 11277

#SCPH28 | Zoology

If a species is a keystone predator, then its removal from a community should

(A) Increase population size of the predator’s preferred prey

(B) decrease species diversity in the prey community

(C) decrease productivity of the predator’s preferred prey

(D) increase species diversity in the prey community

#Question id: 4900

#SCPH12 I Genetics

The chlorophyll-deficient types occur in a particular plant species due to a mutation in the DNA of the chloroplast itself, Female cytoplasm chlorophyll-deficient organisms crossed with male normal chlorophyll will produce progeny

#Question id: 4725

#SCPH28 | Zoology

Ptosis (droopy eyelid) may be inherited as a dominant human trait. Among 30 people who are heterozygous for the ptosis allele, 10 have ptosis and 20 have normal eyelids. What is the penetrance for ptosis?

#Question id: 1740

#I Life Science/ Life Sciences Group – I-V

Activation of resting B-cells by T-helper cells depends directly upon costimulatory interaction between: