Which kingdom in the Domain Eukarya contains multicellular photosynthesizers?
A) Plantae
B) Bacteria
C) Fungi
D) Archaea
E) Animalia
A
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What molecule carries out most of the activities of life, including the synthesis of all other biological
molecules?
a. carbohydrate b. lipid c. protein d. nucleic acid e. carbon
Parathyroid hormone (PTH)
a. stimulates osteoblasts to digest bone. b. stimulates the absorption of calcium in the kidneys. c. helps to inactivate vitamin D. d. is secreted from the thyroid gland. e. stimulates the release of intrinsic factor from the digestive tract
Biochemical evidence supporting the sliding filament model of muscle contraction includes the observation that
A) myosin light chains can be phosphorylated. B) titin connects each end of a thick filament to a Z line. C) TnC binds Ca2+. D) actin has polymerization ATPase activity. E) myosin has an ATP-dependent crossbridge cycle.
The scientist(s) that proposed assigning organisms to one of three domains is(are)
A. Robert Whittaker. B. Francesco Redi. C. Antonie van Leeuwenhoek. D. Robert Koch and Louis Pasteur. E. Carl Woese and George Fox.