Which of the following statements about prokaryotes is false?
a. They lack a true nucleus.
b. They are generally smaller than eukaryotes.
c. They are found only in certain niches.
d. They have a wide range of metabolic activities.
e. They may have a bigger biomass than plants.
C
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Most conifers are __________, meaning that they retain their leaves throughout the year
A. deciduous B. evergreen C. ephemeral D. dioecious E. monecious
Cancer does not typically follow a Mendelian pattern of inheritance because it is usually caused by
A) two gene variants, one dominant and one recessive, and no environmental input. B) specific combinations of alleles and an environmental factor. C) specific combinations of an environmental factor and one dominant gene variant. D) genes that cause death before birth.
Which of the following statements about phloem and xylem is true?
a. Both are driven by transpiration. b. Both have companion cells assisting the process. c. Both move fluids down or up plant stems. d. Both move sugars.
Compare and contrast the advantages and disadvantages of gas exchange in terrestrial and aquatic environments. What will be an ideal response?