The walls of adjacent plant cells are held together by the ____
a. secondary cell wall
b. cell membrane
c. primary cell wall
d. middle lamella
e. plasmodesmata
D
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A cell type that interacts with both the humoral and cell-mediated immune pathways is a _____
A) plasma cell B) cytotoxic T cell C) natural killer cell D) CD8 cell E) helper T cell
One way to study the human genome is to
A) determine the twisting patterns of the two sides of the double helix. B) determine the sequence of sugars and phosphates. C) determine the DNA sequence. D) conduct a phenotype-wide association study.
A neutral atom has two, eight, eight electrons in its first, second, and third energy levels. This information ________.
A) does not tell us about the atomic number of the element B) does not tell us about the chemical properties of the element C) does not tell us about the atomic mass of the element D) does not tell us about the size of the element
On chromosomes within an individual, there are ________ alleles for a given gene found on ________ chromosomes.
a. two; homologous b. four; maternal c. four; paternal d. two; Y