A special capsule or chamber where a plant will make the first cells of the gametophyte generation is
called a ____.
a. vascular system
b. protonema
c. sporangium
d. rhizome
e. shoot system
C
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A mutant gene that produces brown eyes (bw) is located on chromosome 2 of Drosophila melanogaster, whereas a mutant gene producing bright red eyes, scarlet (st), is located on chromosome 3
Phenotypically, wild-type flies (with dull red eyes), whose mothers had brown eyes and whose fathers had scarlet eyes, were mated. The 800 offspring possessed the following phenotypes: wild type (dull red), white, scarlet (bright red), and brown. Most of the 800 offspring had wild-type eyes, whereas those with white eyes were the least frequent. (a) Using standard symbolism, diagram the cross from the P generation (brown-eyed mothers scarlet-eyed fathers) and the F1 generation. Be certain to provide the alleles of the mutant genes. (b) From the information presented above, how many white-eyed flies would you expect in the F2 generation?
Which organism exhibits meroblastic cleavage?
a. echinoderms b. amphibians c. mollusks d. annelids e. birds
Which of the following domains share the most recent common ancestor?
a) archaea and eubacteria b) eubacteria and eukarya c) archaea and eukarya d) None of the above: all three domains evolved from different ancestors. e) None of the above: all three domains are equally related to each other.
Comb jellies may not be the most familiar animal to you, but they are critical in the food chain because they make up a significant portion of the planktonic biomass
Their feeding strategy is predatory and involves adhesives or mucus on their tentacles or other body parts. What feeding tactic do these animals use? A) suspension feeder B) fluid feeder C) deposit feeder D) food-mass feeder