The presumed first step in the transition of the primitive, proto-prokaryotic cell into the primitive, proto-eukaryotic cell was the loss of the cell wall.
a. true
b. false
Ans: a. true
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Kinetochore microtubules assist in the process of splitting centromeres by _____
A) using motor proteins to split the centromere at specific arginine residues B) creating tension by pulling toward opposite poles C) sliding past each other like actin filaments D) phosphorylating the centromere, thereby changing its conformation
Some botanists consider the stoneworts to be a link between the higher plants and the algae. As you will learn in future exercises, higher plants, such as the mosses, have both haploid and diploid stages that are multicellular.
(a) Describe the multicellular organism in the charophytes. (b) Is this organism haploid or diploid? (c) Is the zygote haploid or diploid? (d) Is the zygote unicellular or multicellular?
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
Any individual organism has the potential to evolve if it's given enough time and possesses a mechanism to generate variation
Indicate whether the statement is true or false