The first organisms used in recombinant DNA technology were ____________________
Fill in the blank(s) with correct word
bacteria
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The following question(s) relate to the data table below, showing typical fluctuating pH and dissolved oxygen levels in a fish pond with a heavy concentration of algae over a 24-hour period.TimeOxygen (ppm)pH2 a.m.4.57.74 a.m.2.87.26 a.m.2.26.88 a.m.2.56.810 a.m.3.97.2Noon6.57.72 p.m.10.08.34 p.m.12.18.86 p.m.13.19.28 p.m.13.09.210 p.m.12.08.8Midnight10.88.3In such a pond that contains algae and fish, what is happening to the oxygen?
A. Oxygen is only consumed by the fish B. Oxygen is only consumed by both the algae and the fish C. Oxygen is only produced by the algae D. Oxygen is produced by the algae, and consumed by the algae and the fish
Some microbes can grow in boiling water
Indicate whether the statement is true or false.
In B cell selection and tolerance, if no signal is generated from ________ cells, the B cells remain unresponsive
A) TC B) TH C) B7 D) CD28
How does sickle cell disease cause death?
a. The malformed red blood cells cannot transport oxygen. b. The malformed red blood cells can block capillaries. c. The malformed blood cells have a higher affinity for CO2 than for oxygen. d. The mutant hemoglobin polypeptide cannot bind O2 due to a change in three amino acids. e. More cells assume the sickle shape as oxygen concentration in the tissues increases.