Which of the following is correct:
(a) Cells of all living organisms have a nucleus.
(b) Both animal and plant cells have a well defined cell wall.
(c) In prokaryotes, there are no membrane bound organelles.
(d) Cells are formed de novo from abiotic materials.

Which one of the following living organisms completely lacks of cells wall?

Assertion : The cells that have membrane bound organelles are called eukaryotic. Reason : The cells that lack membrane bound organelles are called prokaryotic.

Which of the following tissues has dead cells with thick and lignified cells walls, having a few or numerous pits?

True or False .If False, give the correct answer: The organelles of both plants and animals are made up of cells.

Which of the following is not correct? (a) Robert Brown discovered the cell. (b) Schleiden and Schwann formulated the cell theory. (c) Virchow explained that cells are formed from pre-existing cells. (d) A unicellular organism carries out its life activities within a single cell.

Write notes for the following: (a) Solar cells (b) Solar panel (c) Solar cooker and (d) Solar thermal power plant

True (or) False. If false write the correct answer : Animal cells have no nucleus.

Which of the following is present in monocot leaves? (A) Bulliform cell (B) Leaf base (C ) Bundle sheath (D) Resin gland (E) Water cavity

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?