Answer the following statements true (T) or false (F)
1. The first bilateral animal emerged during the Ordovician Period. Fossils of this organism were discovered in South Africa.
2..The eukaryotic genome is comprised entirely of genes derived from Archean ancestors.
3. Although not well understood, the Cambrian Explosion most likely occurred due to changes in sea level and continental drift.
4. According to Thomas Malthus, food supplies tend to increase arithmetically while populations tend to increase exponentially, which means that populations will outgrow their food supply.
5. Selective breeding results from programs designed to modify traits in domesticated species.
1. FALSE
2. FALSE
3. FALSE
4. TRUE
5. TRUE
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Large amounts of epithelial cells, many of which are covered by tiny gram-variable rods and coccobacilli, and the absence of inflammatory cells in vaginal discharge are signs of:
a. pelvic inflammatory disease (PID). b. bartholinitis. c. cervicitis. d. bacterial vaginosis.
You find some rather strange plants in your backyard. They consist only of thin, pale yellow stems that are wrapped around other species of plants growing nearby. You experiment by unwrapping some of the strange yellow plants and planting half of them alone in pots of soil and half in pots with other plants from your yard. You water and fertilize both sets of pots, but after a few weeks you find that the yellow plants that were potted alone have died, while those potted with other plants are thriving. What term would you use to describe the strange yellow plants?
A. asexual B. holoparasitic C. monophagous D. aposematic E. hemiparasitic
Which of the lakes in Figure 56-2 may have a thermocline?
a. 1
b. 2
c. 4
d. 1 and 3
e. 2 and 4
Describe the primary types of plant organs, tissues and cells in each of the following: A) maple leaf and B) a potato. How do the organs, tissues and cells reflect the main function of each structure to the plant?
What will be an ideal response?