Which of the following is most TRUE about multicellular organisms when compared with unicellular organisms?
A. Multicellular organisms carry out specialized functions, while unicellular organisms do not.
B. Multicellular organisms can reproduce themselves, while unicellular organisms cannot.
C. Multicellular organisms can digest more complex molecules than unicellular organisms.
D. Multicellular organisms tend to have larger genomes than unicellular organisms.
E. Multicellular organisms show development while unicellular organisms do not.
D. Multicellular organisms tend to have larger genomes than unicellular organisms.
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Excess nutrients in the aquatic environment can cause an initial population surge of primary producers, but eventually results in a collapse of the ecosystem. Which of the following answer choices is not a direct reflection of this statement?
A. Habitats have a particular carrying capacity. B. All trophic levels can be interdependent. C. Communities are shaped by the physical environment. D. Animals interact with their physical environment.
35. The influenza virus contains an RNA genome. Every year a flu vaccine is designed to protect against three different strains of the influenza virus. Why do scientists make a new vaccine each year?
A. The virus develops resistance to the vaccine. B. People change their habits each year and become susceptible to different strains of the virus. C. The virus can rapidly mutate into new strains. D. The common influenza virus can come from many species of animals, including cats and dogs. E. Our bodies develop resistance to the vaccine and it becomes less effective.
The animal in the above photograph was adversely
affected by __________ and is making a comeback thanks to __________. a. global cooling; heat producing chemical added to their diet b. sexually transmitted viruses; a new vaccine c. limited number of natural cavities; artificial nesting boxes d. high incidence of males being born; transplantation of females from other areas e. all of these
If you put the following events in the order they occur in the human digestive system, the third event in the series would be:
a. Cells in gastric pirs secrete protons b. Pepsin activates pepsinogen c. HCl activates pepsinogegn d. Partially digested food enters the small intestine