What property of phospholipids allows them to form cell membranes?
What will be an ideal response?
ANSWER: Phospholipids have both hydrophilic and hydrophobic components. The hydrophilic
phosphate end interacts well with the watery environment outside and inside the cell, while
the hydrophobic fatty acid tails form the middle of the phospholipid bilayer.
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The earliest nucleic acid was probably a simple DNA molecule
Indicate whether the statement is true or false.
____ would keep a population in Hardy-Weinberg equilibrium.
A. Gene flow B. Mutation C. Selection D. Genetic drift E. Random mating
IF PUREBRED PLANT THAT PRODUCES YELLOW SEEDS IS CROSSED WITH A PUREBRED PLANT THAT PRODUCES GREEN SEEDS, THE SEEDS OF ALL THE OFFSPRING ARE YELLOW, WHY?
What will be an ideal response?
The basement membrane is made of
a. connective tissue. b. epithelial tissue. c. adipose tissue. d. proteins and polysaccharides. e. carbohydrates and lipids.