In multicellular species, fungal spores germinate and give rise to filaments called __________. Fill in the blank(s) with the appropriate word(s)
ANSWER: hyphae
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Looking at the data in the figure above from the hare/lynx experiment, what conclusion can you draw?
I) Food is a factor in controlling hare population size. II) Excluding lynx is a factor in controlling hare population size. III) The effect of excluding predators and adding food in the same experiment is greater than the sum of excluding lynx alone plus adding food alone. A) only I B) only II C) only III D) only II and III E) I, II, and III
Essential organic substance that are used in only tiny amount by the body are called
A. trace elements B. hormones C. vitamins D. minerals
The following are steps in using SSU rRNA molecules to develop phylogenetic trees. Place these steps in the correct order.1. Isolate DNA from cells of each organism being tested.2. Amplify the DNA of the SSU rRNA genes of each organism using polymerase chain reaction. 3. Determine the nucleotide sequence of the SSU rRNA genes of each organism.4. Align nucleotide sequences to compare.5. Count the number of nucleotide differences between each pair of sequences and calculate the evolutionary distance.6. Input data into computer and use appropriate software to construct a phylogenetic tree.
Fill in the blank(s) with the appropriate word(s).
In the vertebrate eye, what structure is light focused onto?
A. Retina B. Pupil C. Sclera D. Lens E. Iris