How does the likelihood of the survival of technological societies restrict the number of civilizations with which we might communicate?
What will be an ideal response?
If a society survives a technological level for only 100 years, the chances of communicating with it are small. If most civilizations last only a short time, there may be none capable of transmitting during the cosmically short interval when Earthlings are capable of building radio telescopes to listen for them. On the other hand, a society that stabilizes and remains technologically capable for a long time is much more likely to be detected.
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Where are lysosomal enzymes synthesized?
A. on the rough endoplasmic reticulum B. in the cytosol C. on the Golgi apparatus D. in a vesicle
A fox consumes a meal containing 5000 J of energy, and loses 1800 J in feces. If the fox has a production efficiency rate of 2%, how much energy does it use in cellular respiration and maintenance?
A. 1104 J B. 2200 J C. 44 J D. 2156 J E. 394 J
The diversity of birds is reflected in their feeding mechanisms and locations. Shorebirds, for example, include birds with different length and shape of beaks, length of legs, and food and shore location preference. Describe an evolutionary process that could lead to the observed diversity
What will be an ideal response?
Nondisjunction of chromosomes resulting in aneuploidy occurs during
A. prophase I. B. anaphase I or II. C. metaphase II. D. anaphase of mitosis. E. telophase I.