Home
Class 11
BIOLOGY
Asseration : Sporozoans may have silica ...

Asseration : Sporozoans may have silica shells on their surface.
Reason : Shells of sporozoans help in protection from acidic environment of the host.

A

If both assertion and reason and true and reason is the correct explanation of assertion.

B

If both assertion and reason and true and reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
Sporozoans are endoparasites. The body is covered with an elastic pellicle or cuticle.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion: Mucosal epithelium of gut has goblet cells which secrete mucus. Reason: The mucus in the gastric and pancreatic juice protects the mucosa from excoriation by acidic secretion.

Assertion (A) : He and Be have similar outer shell electronic configuration of type ns^(2) . Reason (R ) : Both are chemically inert.

Asseration : In lichens, mycobiont and phycobiont are symbiotically associated in which algae is predominant and fungi is a subordinate partner. Reason : The fungus provides food and alga protects the fungus from unfavourable conditions.

Assertion : Fossilization is a process by which plant and animal remains are preserved in sedimentary rocks. Reason : When marine animals die, their hard parts like bones, shells etc., are covered with seduments and protected from further deterioration for years .

Assertion: In Taenia solium the gravid proglottids are regularly cut off either singly or in groups from the posterior end by a process caled apolysis. Reason: If helps in transferring the developed embryos from the primary host (man) to find a secondary host (pig).

Atom of seven elements A,B ,C, D, E,F and G have a different number of electronic shells but have the same number of electrons in their outermost shells. The element A and C combine with chlorine to form an acid and common salt respectively. The oxide of element A is liquid at room temperature and is a neutral substance while the oxides of the remaining six elements are basic in nature . Based on the above information, answer the following question given ahead : Which one of the given elements is likely to have the smallest atomic radius ?.