Because old species become extinct as new species evolve, suggest a situation that makes a particular species vulnerable to extinction.
a. alterations in chromosome number
b. ability to compete for limited resources
c. adaptive radiation
d. ability to adjust to a variety of habitats
e. environmental changes for species with highly specialized adaptations
Ans: e. environmental changes for species with highly specialized adaptations
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Which of the following factors would also affect tree growth, and thus complicate the experiment described above?
A. the presence of other tree parasites B. the distribution of nutrients in each tree's local environment C. the amount of leaves, and thus photosynthetic production, of each of the trees D. the ambient light conditions, and thus photosynthetic production, for each of the trees E. All of responses above would also affect the growth of the trees, and thus complicate the experiment described above.
Cellular respiration occurs in the ____
a. lysosomes b. chloroplasts c. mitochondria d. peroxisomes e. Golgi complex
The only antibody that can cross the placenta from mother to fetus.
What will be an ideal response?
Crater Lake in Oregon formed as a result of a(n) ____ about 7,700 years ago
a. asteroid strike b. collapsed volcano c. massive earthquake d. continental shift e. shift in Earth’s axis