C. The platypus, which is a mammal, has a bill like a duck and feet like an otter.
"which is a mammal" is an adjective clause. An adjective clause is used to describe a noun and usually begins with one of these words: that, when, where, who, whom, whose, which, and why. In this sentence, the adjective clause begins with "which" and describes the platypus, which is a noun.
2. she is possibly upset by her result
4. maybe she will wait for me
The DNA in animals and plants are neatly packed.
<h3>What is DNA?</h3>
DNA is the acronym for the word deoxyribonucleic acid which is the genetic molecule that is found inside the cell that bears the hereditary traits of the organism.
The DNA in animals and plants are neatly packed because they are neatly packaged around special proteins called histones.
Therefore, the DNA in animals and plants are neatly packed.
Learn more about DNA here:
brainly.com/question/21265857
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D. Hope it helps :) and sorry if wrong
<span>Although you didn't provide any options, I managed to find some on the Internet. So, the option which best describes sentence 7 is that it is a simple sentence. Simple sentences have only one finite verb (meaning, not infinitives or participles). This sentence has only one verb - rule - which is why it is simple.</span>