Insects exchange gasses through pores called _____, which connect to an internal system of tubes called _____, which are in turn connected to respiring tissues
A. spiracles; tracheae
B. tracheae, spiracles
C. spiracles; radulae
D. radulae; tracheae
E. none of these
A
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Which of the following statements is the most accurate description of fruits and seeds?
A. "Fruits" and "seeds" are synonymous terms. B. Fruits always have fleshy coverings and seeds always have hard ones. C. Fruits are ripened ovaries containing seeds. D. Fruits have endosperm but seeds do not. E. All of the choices provided are incorrect.
Four of the five answers are traits that Homo sapiens had compared to earlier species. Select the exception
a. smaller teeth and facial bones. b. a more prominent chin. c. a higher and rounder skull. d. the capacity for spoken language. e. shorter body form.
The photolysis of water occurs in conjunction with photosystem I
__________________ Indicate whether the statement is true or false.
Ovules are contained within the
A. anther. B. filament. C. style. D. stigma. E. ovary.