The process that results in Ms. Milly’s wilting lettuce becoming firm is osmosis. The explanation is below.
OSMOSIS:
- Osmosis is the process by which water molecules move from a region of high concentration to a region of low concentration via a semipermeable membrane.
- According to this question, Ms. Milly, occasionally sprinkles water on her wilting lettuce and notices that they became firm.
- The firmness of the lettuce is as a result of the movement of water into the leaf cells due to a process called osmosis.
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Answer:
Four innovations are central nervous system, eyes, bilateral and hermaphrodites.
Explanation:
Innovations found in an ancient flatworm were the presence of central nervous system means head and a brain. The head had eyes which is the first in the animal world. Their body is bilateral means equally divided into two parts. They are also hermaphrodites means having male and female on a single organism which was not present at that time of animals.
As discussed in Unit 10 of The Physics Classroom Tutorial, electromagnetic waves are waves that are capable of traveling through a vacuum. Unlike mechanical waves that require a medium in order to transport their energy, electromagnetic waves are capable of transporting energy through the vacuum of outer space. Electromagnetic waves are produced by a vibrating electric charge and as such, they consist of both an electric and a magnetic component. The precise nature of such electromagnetic waves is not discussed in The Physics Classroom Tutorial. Nonetheless, there are a variety of statements that can be made about such waves.
Answer:
It contains 2 or 3 ppm of oxygen concentration.
