The spore-producing body of a cellular slime mould is:

Which organism possesses characteristics of both plants and animals?

The given statements are some characters of a particular group of Kingdom $Protista$.
$(i)$ Most of them are freshwater organisms found in standing water.
$(ii)$ They have a protein-rich layer (called pellicle) which makes their body flexible.
$(iii)$ They have two flagella,a short and a long one.
$(iv)$ Though they are photosynthetic in the presence of sunlight,but in the absence of sunlight they behave like heterotrophs by predating on other smaller organisms.
Identify the correct group on the basis of these characters.

Reproduction in $Paramecium$ is controlled by

The link between prokaryotes and multicellular eukaryotes is ......... .

Some dinoflagellates secrete toxins (saxitoxin) that enter the human body through the food chain and result in ........