Biology, 05.03.2021 20:40 kathiaflores1215
External fertilization and internal fertilization are two ways in which
animals can create a new generation. Which of these types of sexual
reproduction existed first, and why? *
Pleas help
Answers: 3
Biology, 22.06.2019 10:00
Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.
Answers: 1
Biology, 23.06.2019 00:30
Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?
Answers: 3
Biology, 23.06.2019 11:30
Which of the following statements is true? (there may be more then one answer) 1. all multicellular organisms have circulatory systems. 2. all multicellular organisms have specialized cells. 3. all multicellular organisms have skeletal systems.
Answers: 1
External fertilization and internal fertilization are two ways in which
animals can create a new ge...
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