Cytoplasmic division in animal cell involves ________________ and in plant cell involves.
A) prokaryotic fission and cleavage furrow
B) cleavage furrow and cell plate
C) cell plate and cleavage furrow
D) karyokinesis and prokaryotic fission
Ans: B) cleavage furrow and cell plate
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Choose the true statements about molecular clocks.
_____ All molecular clocks tick at the same rate. _____ Molecular clocks can be calibrated using fossil evidence. _____ The rate of a molecular clock for a given DNA character might vary depending on how constrained the character is by natural selection. _____ Ultimately, all molecular clocks depend on the rate of DNA mutation and DNA repair mechanisms.
Select the closest relative to a squirrel.
A. Plants B. Fungi C. Kelp D. Diatoms E. Green algae F. Bacteria
The endosymbiont hypothesis suggests that the mitochondria of eukaryotic cells are descended from captured
a. cyanobacteria. b. archaebacteria. c. aerobic bacteria. d. chemoautotrophic bacteria. e. eukaryotic algae.
These birds resemble each other, but live in vastly different geographic areas. What is their evolutionary relationship?
1.They cannot be related if they lived on different continents.
2.They are vestigial forms of one another.
3.They resemble each other outwardly but are very different internally.
4.They all had a common ancestor.