1. The kidneys in human beings are a part of the system for (a) nutrition
(c) excretion.
(b) respiration
(d) transportation

2. The xylem in plants are responsible for
(a) transport of water
transport of amino acids.
(b)transport of food.
(c)transport of oxygen.

3. The autotrophic mode of nutrition requires
(a) carbon dioxide and water
sunlight
(b) chlorophyll.
(c)all of the above.

4. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm
(b) chloroplast.
(c)nucleus.
(d)mitochondria.

In the united states there are strict fishing seasons and limits, but not all countries enforce similar laws. in bangladesh there are few if any fishing restrictions. what might be the reason for less restrictions in smaller countries like bangladesh? a) the united states is the only country worried about overfishing. b) the united states wants to limit the supply of fish to increase the price. c) bangladesh and smaller countries have an unlimited supply of fish in their coastal waters. d) small countries, such as bangladesh, are practicing subsistence fishing, taking only the fish needed to survive.