Biology, 12.02.2021 16:50 Bubbyd121503
Select the correct statement about current hypotheses for the cause of the Cambrian explosion.
A. Oxygen levels reached a critical threshold at the start of the Cambrian explosion, making the evolution of big, mobile animals possible.
B. With the evolution of algae, oxygen was produced by oxygenic photosynthesis for the first time in the history of life on Earth.
C. Key developmental toolkit genes arose early in the Cambrian, leading to the Cambrian explosion of animal phyla.
D. There are no plausible hypotheses accounting for the rapid adaptive radiation known as the Cambrian explosion.
Answers: 1
Biology, 22.06.2019 04:00
Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. albino x albino a) 1/4 chinchilla, 3/4, agouti b) 3/4 albino, 1/4 chinchilla c) all albino
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Biology, 22.06.2019 16:00
Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!
Answers: 2
Select the correct statement about current hypotheses for the cause of the Cambrian explosion.
A. O...
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