Answer:
the answer is D
Explanation:
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Chordates
Chordates have the 4 unique characteristics, postanal tail, notorchord, pharyngeal gill slits and dorsal-hollow nerve cord. Lancelets is the group of chordates that has a notochord and includes separate males and females.
Lancelet exhibits the four basic characteristics of phylum Chordata. It has a dorsal nerve, a notochord, a post annul tail, and pharyngiall gill slit.
Jawless fish, cartilaginous fish, and bony fish have notochord when they were still young but it was replaced by a vertebral column as they mature.
<span>Lancelets are included in the subphylum cephalochordata. Cephalochordates are gonochoristics. It means that the sexes are separate. Both sperm and eggs cells are released in the water where fertilization occurs.</span>
39. If all the vegetation on a pond died then the organisms and fishes that lives on that pond will no longer have anything to eat and anything to live, thus the probability is that they will also die.
Let’s put ourselves in the shoes of those fishes. If all the plants and vegetation died on that pond, it’s like our home and food were taken from us. Then there’s nothing left. How can we survive without having food?
Prophase, metaphase, anaphase, And telophase
Can you please show us a picture of the theory. It’s a big part of the question.
