Cladograms include in the phylogenetic tree shared primitive characters and shared derived characters. The derived characters can also be called ______ why the primitive characters can also be called ___________.
A. character states; symplesiomorphy
B. symplesiomorphy; ingroup
C. outgroup; synapomorphy
D. synapomorphy; outgroup
E. synapomorphy; symplesiomorphy
E. synapomorphy; symplesiomorphy
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Why do some single-celled eukaryotes occur primarily as haploid cells, whereas others occur primarily as diploid cells?
A. Only the eukaryotes that reproduce sexually will occur as diploid cells. B. Only the eukaryotes that reproduce sexually will occur as haploid cells. C. Only the eukaryotes that reproduce asexually will occur as diploid cells. D. Only the eukaryotes that reproduce asexually will occur as haploid cells. E. None of the answers options is correct.
Microsporidia have a unique organelle, the ________ that is used to invade the host cell.
What will be an ideal response?
In knockout experiments, researchers ________
a. take genes from one species and express them in another b. inactivate a gene by introducing a mutation into it c. inactivate a gene by deleting it from the base sequence d. add promoters to homeotic genes to increase their expression
Many carnivores have lost their taste receptor that detects:
a. bitterness b. saltiness c. sweetness d. sourness e. fattiness