Whorled, simple leaves with reticulate venation are present in

• Calotropis

• Neem

• China rose

• China rose

The unequivocal proof of DNA as the genetic material came from the studies on a 

I) The sporophyte in liverworts is more elaborate than that in mosses
II) Salvinia is heterosporous
III) The life -cycle in all seed - bearing plants is diplontic
IV) In pinus male and female cones are borne on different trees

• Statements (I) and (III)

• Statement (I) and (IV)

• Statements (II) and (III)

• Statements (II) and (III)

Consider the following four statements (I - IV)related to the common frog Rana tigrina, and select the correct option stating which ones are true (T) and which one are false (F).

I. On dry land it would die due to lack of O₂ its mouth is forcibly kept closed for a few days.
II. It has four - chambered heart
III. On day land it turns uricotelic from ureotelic
IV. Its life -history is carried out in pond water.

• I	II	III	IV
  T	F	F	T

• I	II	III	IV
  T	T	F	F

• I	II	III	IV
  F	F	T	T

• I	II	III	IV
  F	F	T	T

In Kranz anatomy, the bundle sheath cells have

• thin walls, many intercellular spaces and no chloroplasts

• thick walls, no intercellular spaces and a large number of chloroplasts

• thin walls, no intercellular spaces and several chloroplasts

• thin walls, no intercellular spaces and several chloroplasts

Which one of the following structures in Pheretima is correctly matched with its function?

• Clitellum - Secretes cocoo

• Gizzard - Absorbs digested food

• Setae - Defence against predators

• Setae - Defence against predators

Selaginella and Salvinia are considered to represent a significant step towards evolution of seed habit because

• female  gametophyte is free and gets dispersed like seeds

• female gametophyte lacks archegonia

• megaspores possess endosperm and embryo surrounded by a seed coat

• megaspores possess endosperm and embryo surrounded by a seed coat

Bulk of carbon dioxide (CO₂) released from body tissue into the blood is present as 

• bicarbonate in blood plasma and RBCs

• free CO₂ in blood plasma

• 70% carbamino - haemoglobin and 30% as bicarbonate

• 70% carbamino - haemoglobin and 30% as bicarbonate

18.

Which one of the following is not an essential mineral elements for plants while the remaining three are?

• Iron

• Manganes

• Cadmium

• Cadmium

Which one of the following is not considered as a part of the endomembrane system? 

• Golgi complex

• Peroxisome

• Vacuole

• Vacuole

Which one of the following correctly represents the normal adult human dental formula?

• 3/3, 1/1, 3/2,/1/1

• 2/2,1/1,3/2,3/3

• 2/2, 1/1, 2/2, 3/3

• 2/2, 1/1, 2/2, 3/3