<p>1)
2)
3)
4)
5)
6)</p>
<p>1) C (broad leaves for capturing sunlight in the densely competitive tropical habitat, poor soil because of competition for nutrients)
2) B (needlelike leaves to conserve water in the desert, short growing season due to paucity of water)
3) E (small plants at high altitudes = tundra)
4) B (surviving and reproducing is typical of natural selection)
5) A (only mutation can describe the spontaneous appearance of a new trait in an isolated population)
6) D (small populations are more likely to experience major shifts in allele frequencies, even total losses of traits; this is an aspect of genetic drift)</p>
<p>I hope that helped.</p>
<p>Why is the answer to question 2 desert and not northern coniferous forests? Don’t the trees in those forests have needle-like leaves? Cacti in deserts have spines, not needle-like leaves.</p>
<p>^ The spines <em>are</em> needlelike leaves. The answer is desert because it has a short growing season, whereas northern coniferous forests have a longer one.</p>
<p>Don’t northern coniferous forests (taigas) have short growing seasons as well? I don’t have the answer key.</p>
<p>I don’t think it’s as short. Consider: coniferous plants are much taller than desert plants, which means that they have more time to grow (on average). For that reason, I chose desert. I don’t have an answer key either, so I could be wrong.</p>
<p>lol, i was able to answer half of these from my ninth grade bio honors class, i am going to be a junior… haha</p>