MCQ
Self pollination between $Tt$ and $Tt$ plants results into genotype ratio of
- A$3:1$
- ✓$1:2:1$
- C$1:3$
- D$4:0$
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$(a)$ Metagenesis is observed in Helminths.
$(b)$ Echinoderms are triploblastic and coelomate animals.
$(c)$ Round worms have organ-system level of body organization.
$(d)$ Comb plates present in ctenophores help in digestion.
$(e)$ Water vascular system is characteristic of Echinoderms.
Choose the correct answer from the options given below.
$T$-cells are lymphocytes which produce the cellular immunity. These are developed from
$1.$ primary treatment of sewage
$2.$ secondary treatment of sewage
$3.$ anaerobic sludge digester
$4.$ production of bioactive molecules