Some deer mice are physiologically adapted to live at high altitudes because of the following:
a. adults maintain fetal forms of hemoglobin.
b. mutations in hemoglobin that increase its oxygen-binding affinity.
c. mutations in myoglobin that increase its oxygen-binding affinity.
d. mutations that increase heart rates.
e. mutations that decrease heart rates.
B
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Analysis of human chromosome 2 reveals that it was produced by the ____ that are still present in our closest
ancestral ape relatives.
a. fusion of many larger chromosomes b. fusion of two smaller chromosomes c. inversion of several centromeres d. reversal of centromere locations e. division of one larger chromosome
Gram-positive bacteria have a structurally and chemically more complex cell wall than gram-negative bacteria.
Answer the following statement true (T) or false (F)
Which of the following is used by all living things as the carrier of genetic information?
A. Cell B. DNA C. Organ D. Molecule E. Population
Which of these statements best explains a benefit of an agroforestry system?
A) It stimulates independence of a community from its natural environment as it modifies the landscape into more modern configurations. B) It provides for uses of the trees that are removed as the system is developed into fields so that there is wood for construction of buildings. C) It makes use of nutrient rich soils to plant successive monocultures that are primarily cash crops used to support the community. D) It mimics the diversity and structure of trees, shrubs and other herbs that are naturally found in the forest and includes many native species