The answer is; Bryophytes are nonvascular plants, and pteridophytes are seedless vascular plants
Pteridophytes have a vascular system (phloem and xylem tissues) but produce spores for reproduction, unlike other higher plants. An example of pteridophytes is the fern. Bryophytes that include Moses are referred to as ‘lower plants because they do not have a true vascular system.
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Wavelength
It is the distance between successive crests of a wave, especially points in a soundwave or electromagnetic wave. Frequency is the rate at which the it is repeated over a particular period of time. Trough is the level at which the wave has the highest point. Crest on the other hand is the opposite of trough it is the lowest point of wave. The unit of frequency is the Hertz. It is the SI unit of frequency, equal to one cycle per second.
Answer: the correct answer may have taken place independently by a variety os species descended from aquatic ancestors.
Explanation:
Scientists think that life started in the oceans as early as 4 to 4.2 billion years ago.
Variation is any difference in organisms of the same species, whereas gradualism is a microevolutionary theory.
<h3>What is a scientific theory?</h3>
A scientific theory is a given explanation on a phenomenon from the real world (e.g., the evolution theory).
The fossil record is a piece of evidence for the evolution theory (which is mainly based on natural selection).
In conclusion, variation is any difference in organisms of the same species, whereas gradualism is a microevolutionary theory.
Learn more about natural selection here:
brainly.com/question/4207376
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