Describe the pathway and process involved in a hormone being released and reaching a target cell.
What will be an ideal response?
Answer: A hormone is produced in the endocrine gland, from the endocrine gland, it diffuses into the blood stream. The blood transports the hormone to the target cell which has receptors for that hormone, that is, the hormone can only act on the cells that have receptors.
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Which of the following is a function of plastids?
a. storing starches, proteins, and pigments b. protecting the cell membrane from damage c. modifying the DNA structure of an organelle d. gathering energy from organic molecules
Which statement describes the function of telomeres?
a. Telomeres are DNA segments that encode cell cycle checkpoint proteins. b. Telomeres are where DNA polymerase binds to initiate DNA replication. c. Telomeres serve as attachment points where microtubules bind to separate chromosomes during anaphase. d. Telomeres are added to chromosomes with each round of replication to increase DNA stability. e. Telomeres protect the coding regions of chromosomes because chromosomes are shortened with each round of replication.
__________ is the wood of flowering plants and __________ is the wood of conifers
a. Hardwood; softwood b. Summer wood; spring wood c. Softwood; hardwood d. Spring wood; summer wood e. Heartwood; softwood
Natality is greater than mortality during the ____ phase.
A. stable equilibrium B. lag C. exponential growth D. death