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In an E. coli conjugation experiment, the donor cell is found to be thr+, leu+, his+, and the F- cell is thr-, leu-, and his-. When the mating is interrupted after 10 minutes and the recipients are plated, they are found to be leu+ and his+ but thr-. What can you conclude?

Compare/contrast a plasmid and Bacterial Chromosome.

for there to be a lot of delicious food.

to look for a tasty restaurant.

to book a flight ticket.

Diploë is spongy bone found in ________ bones.

a)  What is ocean acidification? b)  How is ocean acidification connected to global warming and climate change? bonus) Describe two ways warming and acidification impact biology (positive or negative).

Two boxes move at a right angle to each other on a frictionless surface, as shown in the figure below. The mass moving along the x-axis has a mass of 6.0 kg and a speed of 10 m/s. The mass moving along the y-axis has a mass of 4.0 kg and a speed of 20 m/s.  The directions of the two velocity vectors are indicated in the figure. The boxes collide and stick together after the collision. What is their common speed after the collision? 

Satellites orbiting the Earth: (a)  Describe one reason why satellite surveys are better than a specific method (state the method) for studying the ocean.  1.  (b)  Describe one major disadvantage of satellite surveys for studying the ocean, that is related to electromagnetic radiation. 1.  (c)  Why would I want to go out to sea on a ship and measure chlorophyll when I can obtain surface concentrations by satellite? 1.  

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