A tree in your yard is home to two blue jays, a colony of carpenter ants, a yellowjacket's nest, two squirrels, and millions of bacteria. Together, these organisms represent
The theory that "organisms can modify their bodies through the use or disuse of parts, and these modifications can be passed on to their offspring" was formulated by
Mammalian appendages with similar bone structures can be used for flying, swimming, running, or grasping. These are examples of _______ structures.
Before the modern era of science, organisms were assigned to species categories on the basis of
capability of interbreeding
Organisms that can make their own food are called _______; organisms that must obtain energy fron molecules made by other organisms are called ________.
Unrelated organisms living under similar environments that evolve similar appearing structures, undergo
Dolphins (mammals) and sharks (fish) have stiff dorsal fins projecting from their backs that help them maneuver through water. These structures are best described as
_______ may have evolved from aerobic bacteria and _______ may have evolved from photosynthetic cyanobacteria engulfed by predatory cells.
Populations of living organisms once considered separate species are now sometimes assigned to the same species because:
it was discovered that they can produce viable and fertile hybrid offspring
Two different species of pine release their pollen at different times. This is an example of
The scientist usually given credit for disproving the theory of spontaneous generation of bacteria was: