Which treatment method(s) are used in primary wastewater treatment?
A) biological
B) chemical
C) physical separation
D) biological, chemical, and physical separation
Answer: C
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This is an example of which type of selection?
You are all excited because you just purchased a male guppy that has red, blue and green colors on its fins and tail. Your guppies at home do not have this combination of colors. You place the new male in with three females for mating purposes. After three weeks you have many new baby guppies and most of them have the new color combination. A. Natural. B. Environmental. C. Analogous. D. Convergent. E. Artificial.
Around 150 living genera of animals provide direct support of the endosymbiont theory by ____
a. hosting Archaea in their cells b. having bacterial ribosomes in their cells c. using the cell membrane to protect against bacterial invaders d. ejecting cyanobacterial invaders e. hosting eukaryotic algae or cyanobacteria in their cells
You are a landscape architect working on the grounds of a large estate. After you plant a dozen trees, the owner says, "There's been a mistake. The flowers on some of these willow trees look totally different! I specifically asked for Salix alba. You must have planted two different species." You refer to your tree guide, and read: "Salix alba - species of willow native to Europe and Asia, noted for the white undersides of leaves. Insect pollinated, dioecious. Grows 10-30m tall." How do you respond to the client?
A. "Don't worry, the trees with the smaller flowers just haven't undergone phase change yet." B. "Don't worry, Salix alba is dioecious, meaning each tree has either male or female flowers. That is why they look different." C. "Sorry about that sir, I will dig up the wrong trees right away." D. "Don't worry, when the shorter trees reach full size, they will grow the other kind of flower."
Which of the following would NOT be a photoautotoph?
a) algae b) bacteria c) plant d) animal