Answer:
A
Explanation:
the other answers do not work, they do not make any sense.
Answer:
Explanation:
Agnatha (Ancient Greek is a superclass of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct (conodonts and ostracoderms) species. The group is sister to all vertebrates with jaws, known as gnathostomes.
Recent molecular data, both from as well as embryological data[8] strongly supports the hypothesis that living agnathans, the cyclostomes, are monophyletic.
The oldest fossil agnathans appeared in the Cambrian, and two groups still survive today: the lampreys and the hagfish, comprising about 120 species in total. Hagfish are considered members of the subphylum Vertebrata, because they secondarily lost vertebrae; before this event was inferred from molecular and developmental data, the group Craniata was created by Linnaeus (and is still sometimes used as a strictly morphological descriptor) to reference hagfish plus vertebrates. In addition to the absence of jaws, modern agnathans are characterised by absence of paired fins; the presence of a notochord both in larvae and adults; and seven or more paired gill pouches. Lampreys have a light sensitive pineal eye (homologous to the pineal gland in mammals). All living and most extinct Agnatha do not have an identifiable stomach or any appendages. Fertilization and development are both external. There is no parental care in the Agnatha class. The Agnatha are ectothermic or cold blooded, with a cartilaginous skeleton, and the heart contains 2 chambers.
While a few scientists still regard the living agnathans as only superficially similar, and argue that many of these similarities are probably shared basal characteristics of ancient vertebrates, recent classification clearly place hagfish (the Myxini or Hyperotreti) with the lampreys (Hyperoartia) as being more closely related to each other than either is to the jawed fishes.
The underlined words in the sentences are identified thus;
- 1. My brother is an<u> aficionado</u>, a person who is very knowledgeable and enthusiastic about an activity, subject, or pastime. (DIE: Definition or Explanation)
- 2. That's absolutely a <u>ridiculous</u> price for a sweater. I can't find any reason for it to become so expensive. (GC: General Clue)
- 3. Her traumatic experience made her a self-centered and <u>callous </u>young woman. She became hard-hearted and showed no sympathy for others. (RIS: Restatement or Synonym)
- 4. Liza <u>imitated</u> the house design of her neighbor but her husband changed it to add another window. (CIA: Contrast or Antonym)
- 5. His <u>stalwart </u>(marked by outstanding strength and vigor of body, mind, or spirit) son, applied to join the army. (PC: Punctuation Clue)
Reading the whole text can help in the identification of the context clue being used. In the first sentence, for example, the complex word, aficionado is quickly followed by a definition.
In the second sentence, a General clue is employed as we read the sentence to the end. The reader stresses by implication that ridiculous means expensive.
In the third sentence, self-centered and callous are restated to mean hard-hearted and being without sympathy.
The same logic can be applied to the contrast and punctuation clues.
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