MCQ
According to Robert May, the global species diversity Is about
- ✓$7$ million
- B$1.5$ million
- C$20$ million
- D$50$ million
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$I.$ The bacteria Bacillusthuringiensis $(B t)$ are used to control butterfly catterpillers
$II.$ Fresh spores of $B t$ are mixed with water and sprayed on seeds such as brassicas and fruit trees
$III.$ Insect larvae, after eating these are killed by the toxin released in their gut
$IV.$ Bt toxin genes have been introduced into plants to provide resistance to pests
Which of the statements given above are correct?
$(1)$ In chloroplast membranous system consisting of grana and the fluid stroma.
$(2)$ Pigments are present in stroma.
$(3)$ In stoma, enzymatic reactions in corporate $O_2$ into the plant leading to the synthesis of sugar.
$(4)$ Light is not required for formation of sugarin stroma.