Which of the following pairs of animals represents jawless fishes?

Assertion : Yeasts such as $Saccharomyces \text{ } cerevisiae$ are used in baking industry.
Reason : Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.

When a certain circuit consisting of a constant $emf$ $E$,an inductance $L$,and a resistance $R$ is closed,the current in it increases with time according to curve $1$. After one parameter ($E$,$L$,or $R$) is changed,the increase in current follows curve $2$,when the circuit is closed a second time. Which parameter was changed and in what direction?

Which pair of the following belongs to Basidiomycetes?

From which part of the plant is cocoa obtained from $Theobroma$ $cacao$?

Which of the following is $NOT$ a characteristic of angiosperms?