Ice floats in liquid water because there are, on average, fewer hydrogen bonds between molecules in ice than water,
resulting in a lower density.
Indicate whether the statement is true or false.
ANSWER: False - more
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Explain why a life cycle that includes meiosis must also include fertilization. What is the advantage of such a life cycle?
What will be an ideal response?
An organism with the genotype of AaXx can produce gametes containing __________ if the two genes
are unlinked. a. either Aa or Xx b. either AX, Ax, aX, ax c. AaXx d. AX or ax e. A,a,X,x
Scientists have confirmed by carbon dating that seeds dormant for up to 2000 years can successfully germinate. Based on the requirements for germination, what research expedition should you join in order to retrieve some ancient but viable seeds?
A. A trip to the Irish marsh, where wet peat creates anaerobic conditions, and your colleagues hope to unearth a bog mummy. B. A trip to the arid Dead Sea region, where your historian colleagues have found a storeroom of wax-sealed jars. C. A trip to the Burgess Shale in Canada, where your paleontologist colleagues have found fossils from the Cambrian era. D. A trip to Indonesia, where the civet cat eats and expels coffee beans, producing a gourmet coffee known as Kopi Luwak.
A cluster of rod-like bacteria is known as:
Fill in the blank(s) with the appropriate word(s).