Answer:
c. the hummingbird and the tubular flower it pollinates
The atomic number is 49.
The atomic number is the same as the number of protons. So if there are 49 protons, then the atomic number of element A is 49.
Answer:
The correct answer is - They have substances that counteract acids or bases to prevent the pH from changing
Explanation:
All living organisms including humans are water-based systems, which implies that they rely intensely upon liquid equilibria, particularly acid-base equilibria. Hence, all the acid-base and pH ideas we have talked about so far are critical to the chemistry of organic or biological systems.
This is particularly significant for enzyme, which are proteins that go about as catalysts for all major biological reactions. Most enzymes just work inside a specific pH range. Because all natural cycles are subject to pH, cells and creatures must keep up a particular and consistent pH so as to keep their compounds in the ideal condition of protonation they have specific substances that counteract the acid and base to maintain pH.
for instance:
The pH of the Cytoplasm is maintained by the phosphate ion
The pH of the blood is regulated by the bicarbonate ion
<span>Social interactions may help lower the risk of Alzheimer's disease by the brain constantly working behind the scenes. When a person is socially interacting, they are using their mind even if they don't notice. Someone in the beginning stages of Alzheimer's will not remember a lot of details about their lives. However, socially interacting may be able to bring back memories that will trigger the brain to remember the details they had forgotten. So B is the correct answer.</span>
I presume you are referring to t<span>he fossil plant Elkinsia polymorpha, which is considered the earliest known seed plant, producing seeds along its leaves. </span>