Describe the dermal tissue system
What will be an ideal response?
Dermal tissues cover and protect the entire plant body. In a young plant, this is a simple epidermis, and may be impregnated with a waterproofing cuticle. Some epidermal tissues have tiny hairs or trichomes. Many plants only have an epidermis, and they are considered herbaceous. In woody plants, the epidermis is replaced by bark or periderm, which is much thicker and complex in structure.
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In mammals, Hox genes:
A. specify limbs and other structures associated with each body segment. B. direct development of structures that become parts of the hindbrain, spinal cord, and vertebral column. C. evolved by partial-genome duplication from the ancestral genes. D. are expressed in a sequence that does not reflect their linear order on the chromosome or the regions they affect. E. All of these choices are correct.
Species that usually colonize empty habitats are more likely to show traits that are favored by _____
a. r-selection b. K-selection
The space between the two membranes of the mitochondrion accumulates ____
a. proteins b. H+ c. carbohydrates d. H2O2 e. CO2
Character states shared by the ancestor or outgroup of a clade are called
A. synapomorphies. B. symplesiomorphies. C. plesiomorphies. D. homoplasies. E. derived traits.