Based on the literature, you hypothesize that students in traditional biology lectures will have the same grades as students in online biology lectures. You decide to test your hypothesis by comparing grades of students in traditional and online biology lectures over a semester. As a result of the experiment, you observe that the grades in the traditional lectures and the grades in the online lectures are not significantly different. What do these observations allow you to do?
A. reject the null hypotheses
B. develop a scientific theory
C. accept the hypothesis without further question
D. reject the hypothesis
Answer: A
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What is the primary characteristic that groups phyla within the Ecdysozoa?
A. They all have tropchophore larvae. B. They all shed their exoskeletons. C. They all have radial cleavage. D. They all have lophophores. E. All of the choices provided are correct.
When the microfibrils in the cell wall are oriented in the same direction, the cell will expand in a direction parallel to
the microfibrils. ____________________ Indicate whether the statement is true or false.
Which of the following occurs after a calcium-rich meal?
A) Parathyroid hormone is released by the thyroid gland to inhibit the activities of osteoclasts. B) Calcitonin removes calcium from the blood and stimulates the activities of osteoclasts. C) Parathyroid hormone stimulates the activities of osteoblasts and removes calcium from the blood. D) Calcitonin stimulates the activities of osteoblasts and removes calcium from the blood.
The acellular infectious agent in Figure 13.1 is most likely a (bacteriophage/prion/viroid).
Fill in the blank(s) with the appropriate word(s).