Glands that secrete their product into a duct are classified as ________ glands
Fill in the blank(s) with correct word
exocrine
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Scientists unearth a Wooly Mammoth from the Siberian Ice Sheath and discover that a eukaryotic "amoeba"-like cell is still alive. Which component of the cell membrane might contribute to maintaining the fluidity of plasma membranes under freezing conditions?
A. peripheral proteins B. high levels of long fatty acyl tails within the lipid bilayer C. high levels of unsaturated fatty acyl tails within the lipid bilayer D. absence of cholesterol E. high levels of saturated fatty acyl tails within the lipid bilayer
Which of the following statements about isotopes in living systems is false? a. Radiation can be used to create visual images
b. Living organisms can avoid taking up a radioactive isotope but still absorb the normal isotope of the same element. c. Radioactive sugar is used to measure rates of cell activity. d. Radioisotopes can be used as tracers to follow the movement of an element through a living system.
The species concept defined as a group of organisms that are capable of interbreeding to produce fertile offspring is ________
A) the morphospecies concept B) the phylogenetic species concept C) the biological species concept D) the ecological species concept
What is caused by the human genetic condition called progeria?
a. muscular and mental deterioration shortly after puberty b. socially inappropriate vocal outbursts and muscular twitches c. premature aging that typically leads to death in the early teenage years d. pattern baldness as early as age 20