The vertebrate lung first appeared in which organism?
a. fishes
b. amphibians
c. reptiles
d. birds
e. mammals
a
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Lysosomes are considered to be part of the endomembrane system because they _____
A) deposit end products of digestion in the endoplasmic reticulum B) facilitate movement between stacks of the Golgi C) are formed from products synthesized by the endoplasmic reticulum and processed by the Golgi D) are composed largely of phospholipids
Trace fossils include all of the following except:
A. the mineralized skull of an ancient mammal. B. the trail left by a crawling worm. C. the impression of a bird feather. D. a dinosaur footprint. E. the burrow of an extinct crab.
In gymnosperms, which of the following structures or cell types would be considered spores? Select all correct choices
A. pollen precursor cells in the pollen cones B. mature pollen in the pollen cones C. seeds with the potential to germinate D. egg precursor cells in the ovule cones E. mature eggs in the ovule cones
The offspring of two heterozygous gray-bodied, normal-winged flies should be 50% gray-bodied/normal wings
(BbRr) and 50% black-bodied/vestigial wings (bbrr) because these alleles are linked. Suppose a small number, say 15%, of the offspring are instead black-bodied with normal wings. This is most likely the result of: a. crossing-over. b. incomplete dominance. c. codominance. d. an error in meiosis.
e. mutation