MCQ
In Streptococcus pneumoniae:
- AVirulent form is smooth.
- BVirulent form is rough.
- CNon virulent form is capsulated.
- DAll forms are rough.
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If you cross your unknown plant with one of the plants whose genotype is listed below, you will be able to determine your unknown's genotype. With which plant would you cross it?
$I.$ Ladybirds and dragonflies are used to get rid of aphids and mosquitoes
$II.$ The bacteria Bacillus thuringiensis $(B t)$ are used to control butterfly caterpillars
$III.$ Trichoderma sp. free living fungi, are present in root ecosystems where they act against several plant pathogens
$IV.$ Rhizobium is a symbiotic bacterium that lives in the stem of legumes
Which of the statements given above are correct?