Height in tobacco plants is controlled by _____ gene pair(s) while height in peas is controlled by _____ gene(s)
1.one / many
2.one / two
3.two / four or more
4.two or more / one
4
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Thick- skinned rhinoceroses and elephants were once classified together as pachyderms (meaning "thick skin"). They actually descended from different ancestors that in turn evolved from a thin-skinned common ancestor that was not included in the pachyderms. Pachyderms were therefore, as a taxon,
A. monophyletic. B. polyphyletic. C. paraphyletic. D. a supergroup. E. a kingdom.
In most eumetazoans, the nervous system is derived mainly from which embryonic cell layer?
a. mesoderm b. epiderm c. mesoglea d. endoderm e. ectoderm
________ is the pigment produced by melanocytes that gives skin its color
Fill in the blank(s) with correct word
Which of the following apply to the demography of human populations today? (Check all that apply.)A) Our ecological footprint is decreasing.B) We are using distributed resources disproportionately-less than 20% of us use over 80% of the energy.C) We have plenty of resources still untouched.D) We use almost half of the Earth's land.E) We use over half of all renewable fresh water sources.
What will be an ideal response?