Explain why humans follow a Type I survivorship curve, birds follow a Type II survivorship curve, and angiosperms follow a Type III survivorship curve. How do the traits of these species produce the associated survivorship curve?

Which of these hypothetical species would be least impacted by climate change? An arctic seal A mid-elevation shrub in the temperate zone A coral in a tropical coral reef A wildflower found only on mountaintops An endemic orchid with a coevolved pollinator

Sexual reproduction in plants provides genetic variation. What are the benefits of this genetic variation? O If a population is presented with a rapid change in the environment or a chronic new pathogen or herbivore, then genetic variability would increase the chances of survival of the population. O Sexual reproduction produces less genetic variations which enables a population to co-evolve with other organisms in it's ecosystem. O Sexual reproduction reduces genetic variations which enables a population to take advantage of different resources in it's ecosystem enabling it to exist in a the same niche as others that use the original resources. O Sexual reproduction will always produce a more fit organism. A XE A AY9 Week9_ng....xlsx Week 9 Pre-lab.pdf 10.7591 978150... A MacBook Air Copy of Lab 9 A....pdf

The large and heavy seeds of the limber pine (Pinus flexilis) lack the wings on seeds characteristic of most pines. The seeds are the primary food source for Clark’s nutcracker which harvests seeds after the cones open. It then caches thousands of seeds each summer and fall in locations far from the original tree to eat later in the year. During years when many cones and seeds are produced, the nutcracker caches 3-5x the number of seeds actually eaten. When they are present, tree squirrels remove the cone before it opens before the seeds are fully developed, and will eat the seeds immediately or cache the cone for later consumption.  Question:  Scientists were interested to see whether the two seed harvesters would affect seed and cone traits. They compared cone and seed traits in areas that had nutcrackers but tree squirrels were either present or absent. Where squirrels were present, cone mass was larger but there were fewer seeds per cone, and smaller kernels per seed. What do the…