Researchers have discovered that there is a small remnant population of endangered bluegrass left in a small prairie plot outside of Kansas City. If there are approximately 850 individuals in the cohort, how many individuals can the researchers expect to find alive at the end of the summer, 6 months later?
A. approximately 330
B. approximately 1,000
C. approximately 700
D. approximately 45
E. None of the individuals will be alive 6 months later.
Answer: C
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Only 100 living species are known in this Ecdysozoan phylum. Called velvet worms, they have jaws,
an open circulatory system, and relatively large brains.
a. Arthropoda b. Onychophora c. Nemertea d. Annelida e. Nematoda
What was the big piece of the puzzle that was
missing from Darwin’s theory of evolution in his day?
a. a selection mechanism b. a method of inheritance c. a lack of variation in the organisms he studied d. a mechanism for reproduction e. more than one of these
Embryonic stem cell research may be conducted on what some hospitals and clinics consider biological waste products
Indicate if this statement is true or false?
A man has been standing in one place without moving for a long time. You walk by and notice that his ankles are swollen. What is a likely explanation for this observation?
A) Since the man has not flexed his leg muscles, blood has not moved upward through the veins so it stays pooled at his ankles. B) The man's blood pressure has likely increased because of inactivity, and thus the blood has pooled at his ankles. C) Since the man hasn't flexed his leg muscles, blood has not moved upward through the arteries so it stays pooled at his ankles. D) The man's heart rate has likely increased because of inactivity, and thus the blood has pooled at his ankles.