Guard cell help in
protection against grazing
transpiration
guttation
guttation
B.
transpiration
Guard cells help in transpiration. Each stomatal opening is surrounded by two specialized epidermal cells, called guard cells. Because of their small size guard cells are rapidly influenced by turgor change and thus regulate the opening and closing of stomata.
Which one of the following pairs of animal comprises' jawless fishes'
Lampreys and eels
Mackerels and rohu
Lampreys and hag fishes
Lampreys and hag fishes
The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in
vertebrae
nails
ear ossicles
ear ossicles
Which one of the following acids is a derivative of carotenoids?
Indole butyric acid
Indole -3-acetic acid
Gibberellic acid
Gibberellic acid
The cell junctions called tight, adhering and gap junctions are found in
muscular tissue
connective tissue
epithelial tissue
epithelial tissue
What will happen if the stretch receptors of the urinary bladder wall are totally removed?
Urine will not collect in the bladder
Micturition will continue
Urine will continue to collect normally in the bladder
Urine will continue to collect normally in the bladder
Which one of the following is a vascular cryptogam?
Equisetum
Ginkgo
Marchantia
Marchantia
