Which of the following statements best describes secondary endosymbiosis?
A. A host cell manufactures its own symbiont and later acquires another one by phagocytosis.
B. A host cell ingests another cell already containing a primary symbiont.
C. A host cell ingests two or more symbionts simultaneously.
D. A host cell ingests one symbiont and then later ingests another one.
E. All of the other choices provided are incorrect.
B. A host cell ingests another cell already containing a primary symbiont.
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List at least three types of information provided by a karyotype and interpret the chromosomal structural abnormality
written as 46,XX,t(18q). What will be an ideal response?
Which pair matches the correct macromolecule with the bond that joins its subunits?
a. polysaccharide?peptide bond b. triacylglycerol?glycosidic linkage c. nucleic acid?phosphodiester linkage d. protein?ester linkage e. steroid?peptide bond
Caspases are produced as inactive precursors known as ________
Fill in the blank with correct word.
Common forms of air pollution include smog, acid rain, greenhouse gases, and particulates. What is the main source of these pollutants?
a) burning fossil fuels b) chlorofluorocarbons c) hydrocarbons d) eruption of volcanoes