In which one of the following organism, its excretory organs are correctly stated?
Humans- Kidneys, sebaceous glands and tear glands
Earthworm -Pharyngeal, integumentary and septal nephridia
Cockroach - Malpighian tubules and enteric caeca
Cockroach - Malpighian tubules and enteric caeca
The haemoglobin content per 100 mL of blood of a normal healthy human adult is
5-11 g
25-30 g
17-20 g
17-20 g
Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statement is not correct during the process of nitrogen fixation?
Leghaemoglobin scavenges oxygen and is pinkish in colour
Nodules act as a site for nitrogen fixation
The enzyme nitrogenase catalyse the conversion of atmospheric N2 to NH3
The enzyme nitrogenase catalyse the conversion of atmospheric N2 to NH3
One of the commonly used plant growth hormone in tea plantations is
ethylene
abscisic acid
Zeatin
Zeatin
Which one of the following is a xerophytic plant in which the stem is modified into the flag green and succulent structure?
Opunita
Casuarina
Hydrilla
Hydrilla
Which one of the following pairs of structures is correctly matched with their correct description?
|
Structure |
Description |
|
Tibia and fibula |
Both form parts of knee joint |
|
Structure |
Description |
|
Cartilage and cornea |
No blood supply but do require oxygen for respiratory |
|
Structure |
Description |
|
Shoulder joint and elbow joint |
Ball and socket type of joint |
|
Structure |
Description |
|
Shoulder joint and elbow joint |
Ball and socket type of joint |
Read the following four statements, A, B,C and D select the right option having both correct statements.
A) Z scheme of light reaction takes place in presence of PS- I only.
B) Only PS-I is functional in cyclic photophosphorylation.
C) Cyclic photophosphorylation results into synthesis of ATP and NADPH2
D) Stroma lamellae lack PS-II as well as NADP.
B and D
A and B
B and C
B and C
If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen?
The pancreatic enzymes and specially the trypsin and lipase will not work efficiently
The pH of stomach will fall abruptly
Steapsin will be more effective
Steapsin will be more effective
Given below are four statements (A-D) regarding human blood circulatory system
Arteries are thick -walled and have narrow lumen as compared to veins
Angina is acute chest pain when the blood circulation to the brain reduced.
Persons with blood group-AB can donate blood to any person with any blood group under ABO system
Persons with blood group-AB can donate blood to any person with any blood group under ABO system
