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 |
A.
|
I |
II |
III |
IV |
|
T |
F |
F |
T |
Frogs respire on land and in the water by two different methods. In water, skin acts as an aquatic respiratory organ (cutaneous respiration). Dissolved O2 in the water is exchanged through the skin by diffusion. On land, the buccal cavity skin and lungs act as the respiratory organs. The respiration by lungs is called is called pulmonary respiration.
In frog, heart has three -chambers, two atria and one ventricle, and is covered by a membrane called pericardium
The frog excreates area and thus is a ureotelic animal. It never becomes uricotelic. In the frog, fertilisation is external and takes place in water.
Which one of the following is not considered as a part of the endomembrane system?
Golgi complex
Peroxisome
Vacuole
Vacuole
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 is not an essential mineral elements for plants while the remaining three are?
Iron
Manganes
Cadmium
Cadmium
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
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
Whorled, simple leaves with reticulate venation are present in
Calotropis
Neem
China rose
China rose
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
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)
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
