Nearly all echinoderms are found in which habitat?
A) beaches
B) rivers
C) ocean floor
D) ocean surface
E) lakes
Answer: C
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Which of the following scenarios would provide the most relevant data on population density?
A) Count the number of nests of a particular species of songbird and multiply this by a factor that extrapolates these data to actual animals. B) Count the number of pine trees in several randomly selected 10-meter-square plots and extrapolate this number to the fraction of the study area these plots represent. C) Use the mark-recapture method to estimate the size of the population. D) Calculate the difference between all of the immigrants and emigrants to see if the population is growing or shrinking. E) Add the number of births and subtract the individuals that die to see if the population's density is increasing or decreasing.
What structure is found in all members of the superkingdom Stramenopila?
A. a chloroplast B. a second, smooth flagellum C. a flagellum with stiff hairs D. a cell wall E. None of the answers options is correct..
Monoploids are useful in plant breeding because
A) they can be used to select for plants with desirable recessive traits. B) they will not express any undesirable recessive traits. C) they are one step in the path to creating desirable polyploid plants. D) they are typically resistant to commercial herbicides.
Which of the following is (are) characteristic of acute
inflammation? a. warmth b. swelling c. redness d. pain e. all of these