As part of your senior thesis, you are to isolate an apoptosis inhibitor from plants. You believe you have found such a molecule. If you treat plant embryos with your putative apoptosis inhibitor, which of the following structures would not be formed correctly?
A. sieve tube elements
B. companion cells
C. tracheids
D. phloem
E. epidermis
Answer: C
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X inactivation can lead to ____________________ in females who are heterozygous for X-linked genes
Fill in the blank(s) with correct word
What is periderm?
A. Special epidermal cells that regulate gas exchange B. Outer layer of the vascular cylinder in a plant root C. Layers of cells just inside root endodermis D. Dermal tissue that replaces epidermis on the surfaces of older stems and roots E. Tissue that consists of densely packed dead cells with thickened, waxy walls
The taxon that is composed of similar species that have several important features in common but differ sufficiently to still maintain their status as individual species is which one of the fol-lowing?
a. Class b. Order c. Family d. Genus
True or false? Primates are endotherms
Indicate whether the statement is true or false