Aged erythrocytes are destroyed in the
pancreas
liver
lymph nodes
kidney
Correct answer is B
Together with the spleen, the liver breaks down worn out red blood cells (erythrocytes).
In the mammalian respiratory system. exchange of gases occurs in the
lungs
bronchi
bronchioles
alveoli
Correct answer is D
The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.
prevent algal growth in culture solution
allow root growth
prevent breakdown of mineral elements
prevents photosynthesis in the root
Correct answer is A
Always use a completely opaque water storage tank - Algae uses photosynthesis to reproduce.
When the original king and queen of termites die, they are replaced by
the king and queen of another colony
some adult reproductives from the same colony
some adult workers which are specially fed to breed
developing nymphs nurtured as secondary reproductives
Correct answer is D
When the queen dies, production of the blocking pheromone stops, and secondary reproductives may be produced.
In the Reticulitermes species, the queen and king may be replaced by numerous secondary reproductives, and the colony may become very large with the added productivity of many queens.
46.7
25.0
20.0
30.0
Correct answer is D
Percentage of water content (retained) = \(\frac{Water absorbed}{Weight of soil} * 100\)
→ \(\frac{50 - 35}{50} * 100\)
= 30%