Chapter 38: Q38-8TYU. (page 839)
Draw and label the parts of a flower.
Short Answer
The parts of flowers are diagrammatically represented as below:
Chapter 38: Q38-8TYU. (page 839)
Draw and label the parts of a flower.
The parts of flowers are diagrammatically represented as below:
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Get started for freeCritics of GM foods have argued that transgenes may disturb cellular functioning, causing unexpected and potentially harmful substances to appear inside cells. Toxic intermediary substances that normally occur in very small amounts may arise in larger amounts, or new substances may appear. The disruption may also lead to the loss of substances that help maintain normal metabolism. If you were your nation’s chief scientific advisor, how would you respond to these criticisms?
A correlation is a way to describe the relationship between two variables. In a positive correlation, as the values of one of the variables increase, the values of the second variable also increase. In a negative correlation, as the values of one of the variables increase, the values of the second variable decrease. Or there may be no correlation between the two variables. If researchers know how two variables are correlated, they can make a prediction about one variable based on what they know about the other variable. (a) Which variable(s) is/are positively correlated with the volume of nectar production in this genus? (b) Which is/are negatively correlated? (c) Which show(s) no clear relationship?
(a) Which species would probably fare better in response to a pathogen that infects all Mimulus species? (b) Which species would fare better if a pathogen caused hummingbird populations to dwindle?
Distinguish between pollination and fertilization.
Self-fertilization, or selfing, seems to have obvious disadvantages as a reproductive “strategy” in nature, and it has even been called an “evolutionary dead end.” So it is surprising that about 20% of angiosperm species primarily rely on selfing. Suggest a reason why selfing might be advantageous and yet still be an evolutionary dead end.
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