Which of the following is responsible for nearly 100,000 human deaths worldwide every year?
A) Entamoeba histolytica
B) Amoeba proteus
C) plasmodial slime molds
D) Dictyostelium discoideum
A
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Endoplasmic reticulum (ER) with many ribosomes attached is called ________ ER, whereas endoplasmic reticulum that is mostly devoid of ribosomes is called ________ ER.
Fill in the blank(s) with the appropriate word(s).
Which of the following was the last to appear in the fossil record?
A. pines and other gymnosperms B. all major groups of plants we see today C. mosses and other bryophytes D. ferns and other seedless vascular plants E. angiosperms (flowering plants)
All of the following are functions of cartilage EXCEPT which one?
A) mineral (calcium, phosphorus) storage B) maintaining shape of body parts, such as nose and ears C) protection and cushioning of joints D) reduction of friction at joints E) prebone models in the fetus that develop into bones
The idea of "punctuated equilibrium" suggests that species show little to no evolutionary change throughout their history. When evolution does occur, according to this idea, it happens sporadically and relatively quickly compared to the species' full duration on earth. This idea of evolution in spurts challenges which of the components of Darwin's theory of evolution?
a. steady change b. gradualism c. multiplication of species d. Both a) and b) are correct. e. None of the above is correct.