Which of the following plants both parasitizes other plants and performs photosynthesis?
a. snow plant
b. lady-of-the-night orchid
c. mistletoe
d. cobra lily
e. dodder
C
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Gene order can be inferred from gene expression patterns because
A) an upstream gene can affect downstream gene expression. B) mRNAs for proteins in a pathway are produced at the same time, but then are translated only when the proteins are needed. C) proteins in a pathway are produced at the same time but the proteins that are not needed are degraded. D) mRNAs for proteins in a pathway are produced at the same time and those that are not needed are destabilized by miRNAs. E) gene expression does not depend on upstream genes.
Four of the five compounds listed below are involved
in the light-independent reactions. Select the exception. a. O2 b. carbon dioxide c. ribulose bisphosphate d. phosphoglyceraldehyde e. phosphoglycerate
One of the possible concerns about genetically modified foods is that they might kill organisms that we don't want to kill. Which of the following is an example of this phenomenon?
a) Featherless chickens have become prey to more animals than feathered chickens. b) Genetically modified super-sized salmon have been known to kill the bald eagles that generally feed on them. c) The pollen from plants containing insect-killing Bt genes can be blown onto other plants. Insects that we don't want to kill, such as monarch butterflies, may be killed by such pollen. d) Bears eating genetically modified corn may be poisoned by the Bt gene introduced to the corn to act as a pesticide. e) In the Irish Potato Famine, more than one million people died as a result of the lack of genetic diversity in the potato crop.
A major difficulty facing systematists is
A) sequencing DNA. B) distinguishing similar features due to common ancestry from those due to convergent evolution. C) distinguishing anatomy from physiology in plant evolution. D) understanding the sequence of cell divisions in the early embryology of plants and animals. E) placing specimens into the predefined taxonomic categories of species and genus.