Protection Mechanism III: biochemical
What will be an ideal response?
-Leghemoglobin:
-Globin portion provided by the plant, heme portion by the bacteria
-Similar to hemoglobin in animals, but has a higher oxygen affinity.
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Ecologists are concerned about amphibian populations because
A. their loss would be an aesthetic loss to the planet. B. of the possibility of numerous medicinal uses. C. they are keystone species in many areas—their loss will cause other populations to crash. D. amphibians are very sensitive to environmental change—they may be indicating serious problems. E. they are increasing to the point of competing with indigenous species.
What type of root system do you see on the dandelion at the right?
What will be an ideal response?
Atmospheric CO2 levels have increased approximately ________ since the beginning of the Industrial Revolution
a. 5% b. 10% c. 20% d. 40%
Which of the following is/are true of capsules?
A. They prevent entry of many bacterial viruses. B. They retain water and help prevent desiccation of the bacteria. C. They help bacteria escape phagocytosis by host cells. D. All of the choices are correct.