Answer the following statements true (T) or false (F)
1. Skeletal muscle fibers have more than one nucleus.
2. order for something to be considered a skeleton, it must contain bone or some other hard substance.
3. Endoskeletons may be involved in directly protecting the body surface.
4. You would expect to find higher myoglobin levels in oxidative muscle fibers than in glycolytic muscle fibers.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
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Which of the following is a function of an exoskeleton?
A. Exoskeletons provide protection. B. Exoskeletons help reduce water loss in terrestrial species. C. Exoskeletons provide support. D. Exoskeletons provide a site for muscle attachment. E. All of the answer options are correct.
Among the eukaryotic microbes in the phytoplankton, the ________ are most noted for their contribution to carbon fixation.
A. green algae B. cyanobacteria C. diatoms D. dinoflagellates
Stem cell research is important because __________.
A. it is aimed at treating the whole person—body and mind. B. stem cells can be used to generate virtually any type of specialized cell in the human body. C. it is essential to various types of preventive medical approaches. D. it is the only area of research that does not involve controversies.
What do genetic map units represent?
a. relative positions of genes with respect to each other b. the chromosome on which a given gene is located c. the actual DNA sequence of a gene d. absolute physical distances between genes