Adhesion of cells within animal tissues is accomplished by cell-to-cell junctions called
A) desmosomes. B) tight junctions. C) gap junctions. D) plasmodesmata.
A
Biology & Microbiology
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At a low sugar region of a plant, sugars move from ____ into ____
a. sieve elements; source cells b. sieve elements; sink cells c. xylem; phloem d. phloem; source cells e. the low pressure phloem; the high pressure plant tissue
Biology & Microbiology
Explain the concept of a keystone species
What will be an ideal response?
Biology & Microbiology
Describe the four requirements for chemical evolution and why each was essential. What will be an ideal response?
Biology & Microbiology
Which of the following best describes night-neutral plants?
A) The plants flower at night. B) Plants tend to flower when nights become longer. C) Plants tend to flower when nights become shorter. D) The flowering in these plants is not affected by photoperiod.
Biology & Microbiology