Which of the following are false?
a. Uncontrolled cell division can lead to cancer
b. Positive growth regulators stimulate cell division
c. Negative growth regulators are used to halt cell division
d. A cell has no control over how often it divides
Answer: d. A cell has no control over how often it divides
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Cells spend most of their lives in ________.
A. chromosome duplication B. meiosis C. interphase D. mitosis
Which is the correct sequence of embryonic development in eudicots?
a. globular embryo ? suspensor embryo ? proembryo ? heart stage embryo b. heart stage embryo ? globular embryo ? proembryo ? torpedo stage embryo c. torpedo stage embryo ? globular embryo ? heart stage embryo ? suspensor embryo d. proembryo ? torpedo stage embryo ? heart stage embryo ? globular embryo e. proembryo ? globular embryo ? heart stage embryo ? torpedo stage embryo
Responsible ranching is important to the health of riparian zones because ________
a. cattle movement inadvertently aids plant reproduction in riparian zones b. a few head of cattle can destroy a riparian zone if allowed to graze there without control c. around 70% of endemic species live in riparian zones d. cattle rely on the riparian zones for food and water
After the publication of On the Origin of Species, the idea of evolution was generally accepted. What part of Darwin’s
theory of evolution, however, was fiercely debated?
a. natural selection b. environmental change c. gradual change d. the old age of the Earth e. limited resources