Which one of the following terms applies to the phylum Platyhelminthes?
A. radial cleavage
B. protostome
C. diploblastic
D. acoelomate
E. radial symmetry
D. acoelomate
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To prevent the souring of crude oil, ________ is added to oil well injection water to encourage ________ instead of ________
A) oxygen / aerobic respiration / sulfate reduction B) sulfate / sulfate reduction / fermentation C) sulfate / sulfate reduction / nitrate reduction D) nitrate / nitrate reduction / sulfate reduction
Explain why vegetarians and vegans might be deficient in some amino acids
What will be an ideal response?
In flowering plants, the ovary might appear above the other flower parts or below them. What is the name for those that have ovaries below the other flower parts?
a. under-ovaries b. hypoflourescence c. inferior d. imperfect
The stages of mitosis plus interphase are listed below with letters a
through e. Select the correct phase for each statement numbered 70–80. a. interphase b. prophase c. metaphase d. anaphase e. telophase E 70. Homologous pairs of chromosomes line up on the equatorial plate. M 71. Chromosomes replicate. M 72. Genes replicate. E 73. DNA replicates. E 74. Condensation and shortening of chromosomes occurs. E 75. Spindle fibers first appear. M 76. Centromeres break apart as the separated sister chromatids begin to move to opposite poles. E 77. The microtubular spindle develops. E 78. Sister chromatids joined at their centromeres are attached to spindle fibers. M 79. Cytokinesis occurs after this phase of mitosis. E 80. Daughter nuclear membranes form.