The environment of an organism would include its
A. enemies.
B. food.
C. diseases.
D. All of these answers are true.
D. All of these answers are true.
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Researchers have tested Lack's hypothesis on clutch sizes, and the results are shown in the accompanying figure
In this graph, the histogram shows actual clutch sizes over 22 years for the Great Tit (Parus major), whereas the individual data points reflect results of manipulation of clutch size. According to this data, ________. A) Lack's hypothesis is supported B) there is an ideal clutch size in terms of survival; however, this species of bird is not producing as many offspring as could survive, therefore Lack's hypothesis is not supported C) there is an ideal clutch size in terms of survival—which is more than the number of offspring that are being produced; however, the results still support Lack's hypothesis D) there is no apparent ideal clutch size because of discrepancies in these data
Compression fracture is most likely to occur in which of the following bones?
A) vertebra B) parietal bone C) rib D) ethmoid E) mandible
A bacterium that uses the oxidation of inorganic compounds to provide energy for manufacturing
nutritious organic compounds is a: a. photoautotroph. b. parasite. c. saprotroph. d. chemoautotroph. e. pathogen.
Cell theory or cell doctrine is based on some basic principles. Choose the description that best addresses these principles.
A. All living things are composed of one or more cells. B. All life is composed of two or more cells, the smallest unit of life are cells, and cell division from pre-existing cells is the only way cell continue to exist. C. New cells come only from pre-existing cells by cell division. D. Cells are the smallest unit of living organisms, and new cells form from pre-existing cells by cell division. E. All living organisms are composed of one or more cells, cells are the smallest units of life, and new cells come only from pre-existing cells by cell division.