Select the closest relative to a squirrel.
A. Plants
B. Fungi
C. Kelp
D. Diatoms
E. Green algae
F. Bacteria
B. Fungi
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What is the simplest method to measure population density in a given area?
A. Count the number of organisms. B. Perform a line transect. C. Look for random dispersion patterns. D. Count the number of reproductive adults. E. Calculate a survivorship curve.
PCR uses two components: ____________________ that serve as templates and primers that bind to regions on either side of the template to be copied
a. yeast artificial chromosomes b. tRNA that has been cut by restriction enzymes c. mRNA that has been cut by restriction enzymes d. double strands of DNA e. single strands of DNA
Experiments with mouse cells indicate that long noncoding RNAs ____
a. block cardiac cell development b. play a role in cardiac cell differentiation c. are not expressed in embryonic stem cells d. are only expressed after cardiac cells have differentiated e. are transcription factors that promote cardiac cell differentiation
You are doing field study work with a scientist studying spiders in the Amazon rainforest. You come across a previously undiscovered species of spider and set up a video camera with a zoom lens to observe it closely without disturbing it. You see the
female spider lay two eggs, kill an ant that tried to eat one of the eggs, and preserve the ant to feed the hatchlings the next day. She lays two more eggs as soon as the two offspring grow larger and leave. When your mentor asks for a monthly update, what exciting news do you have for her about this species? A) It exhibits unusual zero population growth tendencies. B) It exhibits unusual K-selected tendencies. C) It exhibits unusual intelligent learning tendencies. D) It exhibits unusual r-selected tendencies.