Investigation to determine whether light is necessary for photosynthesis, a leaf was obtained from a plant that was first places in a dark cupboard for 48hours before it was again exposed to lights. state two possible reasons why only part of the leaf was covered with cardboard? ​

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!