Examine the phylogenetic tree depicted in Figure 26.17 as you address the following questions. The ability to produce methane is constrained to Archaea that optimally grow at temperatures ranging from 20-60 °C
A. true
B. false
B
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Choose the item in column 2 that best matches each item in column 1.
A) diffusion and passive and active transport B) both passive and active transport C) diffusion D) active transport E) none of the listed processes F) both diffusion and passive transport G) indirect active transport H) passive transport 1) requires a specific integral membrane protein 2) dependent on solubility properties of the solute 3) requires cellular expenditure of energy 4) Keq = 1 5) Na+/glucose symport 6) Na+/K+ pump 7) exclusively involves the transfer of small, nonpolar molecules 8) applies only to ions 9) ?G° = 0 10) direction of transport is dependent upon the concentration gradient at any given point in time 11) requires ligand binding and therefore Michaelis constants can be calculated
Natural communities recycle nutrients, but cultivated communities often require an input of mineral nutrients due to losses through
A. erosion. B. humus. C. nitrogen fixation. D. crop rotation. E. iron accumulation.
Which of the following is not a characteristic of parenchyma cells?
a. They all lack the ability to photosynthesize. b. They can differentiate into other kinds of cells in response to an injury to the plant. c. They may contain various storage materials, such as starch grains, oils, or water. d. They must be living cells in order to function. e. They may secrete substances of various types.
Mitochondrial electron transport takes place ________.
A. on the outer mitochondrial membrane B. in the fluid matrix of the mitochondria C. on the inner mitochondrial membrane D. on the outer mitochondrial membrane and on the inner mitochondrial membrane