In humans, what cells do not have a nucleus when mature?
a. erythrocytes
b. lymphocytes
c. neutrophils
d. eosinophils
e. monocytes
a
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A sea turtle lays its fertilized eggs in the sand to grow until baby turtles hatch. Does the sea turtle exhibit internal or external fertilization?
What will be an ideal response?
Proteomics is the ________
A) changing of the terminal sequences of proteins to alter their function B) process of defining the complete set of proteins encoded by a genome C) harvesting of proteins from a cell to determine their economic value D) rational design of drugs based on protein structure E) manipulation of amino acid sequences in proteins to alter their function
A single basic dye is used in simple stains
Indicate whether the statement is true or false
Which of the following likely triggered the Holocene extinction?
a. European colonial expansion in the 1600s b. The rising popularity of zoos in the late 1800s c. A large asteroid hitting Earth more than 250 million years ago d. An unprecedented increase of photosynthetic organisms 2.45 billion years ago