In a prometaphase cell, the:
a. mitotic spindle is beginning to assemble.
b. nucleolus disappears.
c. spindle fibers pull chromosomes to opposite sides of the cell.
d. duplicated chromosomes become visible with the light microscope.
e. nuclear envelope is visible with the light microscope.
Ans: b. nucleolus disappears.
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Based on the phylogeny shown, indicate the groups that are monophyletic (Select all that apply).
_____ rose and oak
_____ pine, ginkgo, oak, and rose
_____ fern, pine, and ginkgo
_____ Psaronius, fern, pine, ginkgo, oak, and rose
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about monophyly?
Consider Possibilities
· Consider the different answer options. Which can you rule out?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process · 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?
Answer the following statements true (T) or false (F)
1. There are no parasitic crustaceans. 2. Each arm of the starfish differs internally, one being specialized for reproduction, another for respiration, a third for digestion, a fourth for the water vascular system, and the fifth for the nervous and circulatory systems. 3. Autotomy is the ability of an animal to lose a body part and subsequently regenerate it. 4. Echinoderms have an exoskeleton.
Refer to the figure below for the following question(s)
©2014 Brooks/Cole, Cengage Learning Using the information in the following table, fill in the cladogram with the appropriate groups (A-J) and the distinguishing characteristics (K-S). ©2014 Brooks/Cole, Cengage Learning A. B. C. D. E. F. G. H.
I. J. K. L. M. N. O. P. Q. R. S.
What will be an ideal response?Which of the following statements regarding leaf structure and function is not true?
a. Most photosynthesis takes place in the palisade mesophyll. b. Most stomata are usually found on the upper epidermis rather than the lower. c. The palisade mesophyll is more densely packed than the spongy mesophyll. d. A waxy cuticle covers the epidermis of many leaves. e. The epidermis of many leaves has associated trichomes.