How do nonsteroid hormones differ from steroid hormones?
What will be an ideal response?
Ans: nonsteroid hormones act via signal transduction pathways; steroid hormones do not act via signal transduction pathways
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Two of the main ingredients in plant fertilizer are phosphorus and nitrogen. These elements are required for the synthesis of __________________, respectively, in the cells of the plants
A. DNA and proteins B. proteins and complex carbohydrates C. complex carbohydrates and DNA
Vertigo is the sensation of dizziness. Which structure is most likely involved in this sensation?
a. basilar membrane b. pinna c. semicircular canals d. stapes e. oval window
What event will increase the frequency of a
mutation in a population over time?
a. fitness b. natural selection c. artificial selection d. adaptive radiation e. none of these
What are the tiny, absorptive structures on the root cells near the root tip?
A) taproots B) rhizomes C) root hairs D) root buds