Ecology Environment

Step 1: The reaction between and in RBC is catalyzed by the enzyme carbonic anhydrase. This reaction occurs much faster in RBCs compared to blood plasma. This enzyme is highly concentrated in RBCs, which explains why the reaction is faster in these cells. Therefore, both the assertion and the reason are correct, and the reason correctly explains the assertion.

Step 1: The first statement, "Natural aging of a lake by enrichment of nutrients is known as eutrophication," is correct. Eutrophication is the process where a body of water becomes overly enriched with minerals and nutrients, leading to excessive growth of plants and algae. Step 2: The second statement, "Increase of concentration of pollutant at successive trophic levels in aquatic food chain is known as biomagnification," is also correct. Biomagnification refers to the increasing concentration of toxic substances in organisms at each trophic level of the food chain. Thus, both statements are true.

Step 1: Let's break down the matching of the items.
- UV-B rays are known to cause ozone depletion, leading to increased UV exposure, which is related to the concept of Snow blindness (II).
- Greenhouse gases are primarily responsible for the phenomenon of Global warming (IV).
- Particulates, especially pollutants, are involved in processes like eutrophication and can also be filtered by Electrostatic precipitators (I).
- Automobile emissions are associated with the use of Catalytic converters (V), which help in reducing harmful emissions.
Thus, the correct match is:
A - II (UV-B rays and Snow blindness)
B - IV (Greenhouse gases and Global warming)
C - I (Particulates and Electrostatic precipitators)
D - V (Automobile emissions and Catalytic converters)

Step 1: Tall T-waves in an ECG are generally associated with an increase in potassium levels in the blood, a condition called hyperkalemia.
Step 2: Hyperkalemia affects the electrical activity of the heart and can result in the tall T-waves as seen in an ECG.
Step 3: Thus, the correct answer is hyperkalemia.