List some of the environmental factors that may be associated with male and female infertility
What will be an ideal response?
ANSWER: Environmental factors such as a person’s health or lifestyle can affect male fertility. Such
factors include obesity, being underweight, malnutrition, emotional stress, alcohol or drug
dependency, exposure to pesticides or other chemicals, and tobacco smoking. Many of the
environmental factors that cause female infertility are the same as those that cause male
infertility. In addition, female athletes with vigorous training regimens, such as cycling and
running, may experience dysfunctions of their menstrual cycles, a condition called athletic
menstrual cycle irregularities. The dysfunctions include amenorrhea (no menstrual periods)
and cycles of normal length but without ovulation.
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The cell's plasma membrane mediates which of the following transactions with the environment? Choose all that apply.
_____ Ingesting food molecules and sometimes entire cells _____ Returning waste and other molecules back to the environment _____ Responding to a host of chemical cues _____ Directing synthesis of various food-digesting proteins _____ Passing messages to other cells
________ saw a decrease in manufacturing employment from 1960 to 1990
A) France B) United Kingdom C) Belgium D) Sweden E) France, United Kingdom, Belgium, and Sweden
The purpose of this image was to promote
1.a sleep aid for soldiers
2.information from a war zone
3.newly discovered antibiotics
4.none of the choices
Which of the following binds to codons?
A) DNA B) Transfer RNA C) Messenger RNA D) RNA polymerase