The forelimb of a bat and the forelimb of a bird are examples of structures.
A. homeotic
B. analogous
C. homologous
D. vestigial
E. heterologous
C. homologous
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Muscle tissue that controls involuntarily movement and composed of spindle-shaped cells is _____ muscle
A. smooth B. cardiac C. skeletal D. either skeletal or cardiac E. either cardiac or smooth
Overharvesting has primarily threatened which of the following?
a. aquatic species b. tropical forests c. subtropical deserts d. endemic species
Which two vessels systemically circulate blood and return it to the heart?
A. pulmonary vein and inferior vena cava B. superior vena cava and pulmonary vein C. aorta and inferior vena cava D. inferior vena cava and superior vena cava E. aorta and superior vena cava
HeLa cells can vary in chromosome number. This panel of chromosomes shows all of the chromosomes in a single metaphase HeLa cell. Which chromosome number has a normal number of copies?