What is the composition of a tetrad at the beginning of prophase I?
What will be an ideal response?
Answer: One pair of homologous chromosomes
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In life cycles that alternate between haploid and diploid stages, fertilization doubles the number of chromosomes per cell while ______ reduces it in half.
A. mitosis B. meiosis C. binary fission D. syngamy
Fishery landings are an important source of:
a. catch data. b. size data. c. effort data. d. all the above
Cells produced on the inside of the vascular cambium differentiate to form which vascular tissue?
a. cork cambium b. primary phloem c. primary xylem d. secondary phloem e. secondary xylem
Which key symptoms listed below can be used to distinguish between plants deficient in phosphorous vs. nitrogen (which symptom(s) is only associated with one of the deficiencies)?
A) the plants are stunted. B) the plants show symptoms on older leaves first. C) the plants are darker green and show evidence of wide spread purple anthocyanin pigmentation, especially in the veins. D) the plants show symptoms on younger leaves first.