Answer:
The correct answer is option a. "Polymorphisms of genes encoding metabolizing enzymes".
Explanation:
Although doctors prescribe defined doses of drugs according to the patient, an individual can respond differently to a drug according to its specific genomic sequence. The influence of the genome in this case comes from polymorphisms of genes encoding metabolizing enzymes. The study of these polymorphisms is known as Pharmacogenomics, and the most important enzymes that metabolize drugs include: cytochrome P450, cytochrome b5 and NADPH-cytochrome P450.
A is correct. We know that water buildup is essential for plants (and all other organisms) that live in the desert due to its lack of moisture. So, the question is simply asking which adaptation will help a plant retain the most water in the desert. Here’s what makes each wrong or right:
A. Stem that stores water - Having stems that can retain a lot of moisture and water is absolutely necessary for plants that live in hot and dry biomes. The brief periods of rain in the desert make it easier for plants with water-storing stems to absorb the water and remain hydrated throughout their time. This is referred to as succulence, and most (if not all) plants in the desert are succulents. This is the correct answer!
B. Shallow root system - Many plants that live in deserts tend to have shallow root systems that allow them to quickly absorb and moisture in the environment — and because water never goes too far in the desert, they soak most of it up. Although this is helpful, it is better for plants that live in places with a lot of soil.
C. Large surface area - Having a large surface area is more useful for photosynthesis and may result in dehydration. This is wrong!
D. Flat broad leaves - Again, this adaptation is more favorable for plants that do not live in the desert because, as we know, photosynthesis requires water.
Fish take water into their mouth, passing the gills just behind its head on each side.
Calcium Carbonate and Phosphorus.
I had this on my biology test last week.
Answer and Explanation:
Abiotic factors are those that are nonliving, while biotic factors are those that are living.
Abiotic factors in a classroom:
- chairs
- tables
- blackboard
Biotic factors:
- class pet
- plant in the classroom
Hope this helps!