Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by: mutation. random mating between organisms.
Options are:
A. Online shopping offers consumers both risks and convenience.
B. Consumers are limited by shipping charges when shopping online.
C. Online shopping is less expensive than shopping in traditional stores.
D. Items found while shopping online are of better quality than store products.
The correct answer is:
A. Online shopping offers consumers both risks and convenience.
Choice A tells us about the text as an entire<span>, summarizing the central </span>ideas<span> that </span>online shopping is<span> risky but convenient too.</span>
Early hypothesis was not based on experimentation
This is just an educated guess. As the purple pigment, caused by anthocyanins, are on the bottom side of the plant, their purpose could probably be to direct the light.
Specifically, a purple pigment on the bottom of the plant would absorb certain wavelengths near the purple spectrum, and reflect other wavelengths back toward the portion of the plant with chlorophyll. In this way, light does not simply pass through the leaf, instead it is reflected back in towards the chlorophyll to maximize the amount of light being used for photosynthesis.