The entire process of producing two cells from one
cell
a. starts with prophase.
b. ends with cytokinesis.
c. results in the equal distribution of organelles
between cells.
d. occurs only in multicellular organisms.
e. starts with prophase and ends with
cytokinesis.
Answer: e
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Patients are instructed to collect sputum specimens in such a way as to minimize contamination with normal microbiota from the mouth. A sputum specimen has arrived in the clinical laboratory and a Gram-stained smear of the specimen reveals a mixture of Gram-positive cocci, Gram-negative cocci, and Gram-positive bacilli as well as numerous squamous epithelial cells.This result indicates
A. a poor quality specimen of primarily saliva and oropharyngeal microbiota. B. that the specimen has been properly collected and is representative of sputum. C. that the patient has bacterial pneumonia rather than viral pneumonia. D. that the patient has a pneumonia caused by a mixture of different bacteria.
The molecule in the accompanying figure is the pyrimidine ____, which is typically found in DNA but not RNA
a. thymine b. adenine c. uracil d. guanine e. cytosine
Humans belong to which class of animals?
A) Bacteria B) Archaea C) Eukarya D) vertebrates
Which genotype would have an advantage if a recessive allele changed cellular proteins that led to circulatory problems and premature death?
A) Any homozygous individual will always have an advantage over any heterozygous individual. B) Any heterozygous individual will always have an advantage over any homozygous individual. C) Any homozygous dominant individual will always have a disadvantage compared to any heterozygous individual. D) Any heterozygous individual will have an advantage over any homozygous recessive individual.