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Your 60-year-old male patient experiences periodic pain in t…

Your 60-year-old male patient experiences periodic pain in the upper chest and left shoulder when he overexerts himself, is under emotional stress, or is in places where the temperature and humidity are high.  He has had this problem for several years, and the pain is relieved with rest and taking a nitroglycerin tablet.  The most likely reason for these symptoms is: 

In a population of rabbits, some have thick fur and some hav…

In a population of rabbits, some have thick fur and some have thin fur. A sudden drop in temperature occurs during the winter. Rabbits with thick fur are better able to survive the cold. Based on the process of natural selection, predict what is likely to happen to this rabbit population over several generations.

Scientists have discovered a strange new organism in a tropi…

Scientists have discovered a strange new organism in a tropical forest. Observations include: It grows bigger over time. It reproduces by splitting into two smaller organisms. It moves toward sunlight when placed in a dark room. It takes in nutrients from the soil and uses them for energy. It reacts to touch by curling up. It has blue spots. It glows in the dark. Which of the following characteristics indicate that this organism is alive? Select all that apply.

Imagine you are a biologist tasked with designing the perfec…

Imagine you are a biologist tasked with designing the perfect animal for a specific job (function): Flying long distances Catching prey Blending into its environment Using your imagination, create your own animal that fits ONE (1) of these jobs. Can you picture it? Great! Now, in your answer, briefly describe TWO (2) specific structures (forms/features) of your animal that help it survive and perform that function.