<span>B) He noticed four-fifths of the air had been used up. If by air this question is referring to oxygen, the fact that it has been used up means it has reacted, mean a substance has combusted.</span>
Answer:
B. Some countries have many sources of beryllium, and some have no sources of beryllium.
Explanation:
Beryllium is a very important mineral that is present in many countries. All countries did not have beryllium deposits. Some countries have many sources and deposits of beryllium, and some have no sources of beryllium. There are many deposits of beryllium in different parts of United states of America. Those countries which have no beryllium deposits have cell phones because they purchase cell phones from international market by paying money which can be earned through selling of its goods.
A water lily will have more stomata. A desert cactus will have very few stomata, because in deserts plants face water shortage so in order to avoid loss of water cacti have adapted to the desert environment by possessing few stomata.
The correct answer is that during cross-pollination the pollen grains are carried from one plant to another plant. During self-pollination, the pollen and ovules are from the same plant.
In self-pollination, the pollen from the anther is deposited on the same flower's stigma, or on the stigma of another flower of the similar plant. In comparison, out-crossing or cross-pollination results in greater genetic diversity as the pollen grains and ovules are obtained from different plants.
Answer:
it regulates the amount of air or moisture leaving or entering the leave
Explanation:
this is because it has tiny pores which helps in regulating the moisture or heat content leaving or entering the leave
