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For the phylogeny above, which of the following could be considered an ancestral trait?

1. What does heterospory mean? 2. Give an example of a plant that is heterosporous.

What are TWO traits you could look for to determine if an animal is an arachnid or an insect?  Be sure to state which group has which version of the trait. 

Which kind of virus has to turn its RNA genetic code into complementary mRNA first before it can translated into proteins at the host cell’s ribosomes?

Arctic foxes (a mammal species) and willow ptarmigans (a bird species) are both brown in summer and white in winter. The common ancestor of all birds did not become white in winter and neither did the common ancestor of all mammals. What type of trait is seasonal white coloration for arctic foxes and willow ptarmigans?    

Name a phylum that is NOT a bilaterian and tell me two traits of the organisms in that phylum.

Place only the numerical portion of the answer in the blank.  You will only receive 1 point for the correct answer.  All supporting work must be shown to receive full credit.  Round to the nearest hundredth when necessary. The Henley’s have a silo on their farm to store grain.  Assuming the entire space is used, what is the maximum amount of grain that the silo can hold?  

Place only the numerical portion of the answer in the blank.  You will only receive 1 point for the correct answer.  All supporting work must be shown to receive full credit.  Round to the nearest hundredth when necessary.  

Find the surface area of the figure below.  Place the correct letter choice in the blank.  You will only receive 1 point for the correct letter choice.  All supporting work must be shown to receive full credit.  Round to the nearest hundredth when necessary.

6. In the middle of the fierce battle with Humbaba, Gilgamesh almost loses Enkidu to Humbaba’s attack. He recovers his composure and is about to kill Humbaba when