Assuming that the probability of having a female child is 50% and the probability of having a male child is also 50%, what is the probability that a couple's first-born child will be female and that their second-born child will be male?
A) 20%
B) 25%
C) 50%
D) 75%
Answer: B
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A small molecule of RNA is transcribed in the nucleus. It is folded, cleaved by dicer protein, and then binds to a target
molecule of mRNA. This molecule of RNA must be ____.
a. miRNA b. siRNA c. an mRNA that was not properly capped d. an mRNA that never received its poly-A tail e. a transcript for a repressor protein
Which of the following is NOT a feature that is
found exclusively among all vertebrates? a. notochord b. pharyngeal gill slits c. four legs d. post-anal tail e. dorsal nerve cord
What is one way in which the cardiovascular system of a mammal is different than that of an arthropod such as an insect?
A) The heart of the mammal pumps blood into arteries, while the insect heart does not. B) Veins send blood to a mammal's lungs, while insect veins send blood to the heart. C) A mammal's blood is always contained inside vessels, while an insect's blood sometimes leaves the vessels. D) A mammal has a heart to pump blood, while an insect does not have a heart.
A genetic capacity to learn, combined with actual experiences in the environment, shapes most forms of behavior. Use the example of songbird's learning their song to demonstrate the role of imprinting and environment on learning
What will be an ideal response?