Zara has worked for 40 years at a garden center, where she often potted plants. In the early days, she frequently worked with vermiculite, an asbestos-like material
Which organelles are most likely to have destabilized membranes as a result of exposure to vermiculite? A) nuclei
B) mitochondria
C) Golgi complexes
D) lysosomes
D
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Polyploidy is a mechanism of sympatric speciation most common to ____
a. mammals b. birds c. amphibians d. plants e. fishes
Which of these is the portion of the heartbeat that involves contraction of the heart?
A) cardiac cycle B) pacemaker C) diastole D) systole
From the data shown what can you conclude about the amount of time these plant cells spend in various stages of the cell cycle?
A) Cells spend more time in cytokinesis than in synthesizing new DNA during chromosomal duplication. B) Metaphase is the longest stage of mitosis. C) Metaphase lasts about twice as long as anaphase D) Cells spend less time in prophase than any other of the stages of mitosis.
When guard cells are filled with water, ____
a. stomata are open b. stomata are closed c. sugars diffuse into the sieve tube members d. gases cannot diffuse into the plant e. gases cannot diffuse out of the plant