In the pathway to form cells, which was the last to form
What will be an ideal response?
lipid spheres
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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.
Blood leaving the legs and pelvis returns to the heart through the ____
a. ascending aorta b. abdominal aorta c. coronary artery d. superior vena cava e. inferior vena cava
How long have prokaryotes lived on Earth?
What will be an ideal response?
In transmission electron microscopy, spreading a specimen out in a thin film with uranyl acetate, which does not penetrate the specimen, is called ________.
A. shadow staining B. freeze-etching C. negative staining D. simple staining