Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 18.3, Problem 2CYL
- describe the advantages that fostered the origin of multicellularity?
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place the evolutionary steps that led to complex multicellularity in the order in which they thought to have occurred. a) The ability of cells to stick to each other
b) Differential gene expression in cells
c) The ability to communicate between cells
d) The ability to move molecules by bulk flow
A sclerocyte is :
a) a stem cell
b) a cnidarian cell
c) a porifera cell
d) a polychaeta cell
Multicellular organisms such as plants and animals belong to which domain?
Chapter 18 Solutions
Biology
Ch. 18.1 - How Would the experiments result charge if oxygen...Ch. 18.1 - describe a likely scenario for the origin of life?Ch. 18.1 - describe, for each step in the scenario, some...Ch. 18.2 - Uranium-235, with a half-life of 713 million...Ch. 18.2 - Scientists have identified a free living bacterium...Ch. 18.2 - describe scenarios for the major evolutionary...Ch. 18.2 - State the order in which these events occurred,...Ch. 18.3 - describe fossil evidence of the earliest...Ch. 18.3 - describe the advantages that fostered the origin...Ch. 18.3 - Prob. 3CYL
Ch. 18.4 - Prob. 1TCCh. 18.4 - Does the mudskippers ability to walk on land...Ch. 18.4 - Can ancient DNA reveal the secrets of dinosaur...Ch. 18.4 - Although it may never be possible to recover DNA...Ch. 18.4 - describe the transitions and innovations...Ch. 18.4 - describe the advantages gained by the first plants...Ch. 18.5 - Scientists have cloned a number of animal species,...Ch. 18.5 - explain how extinction has affected the course of...Ch. 18.5 - describe the likely causes of mass extinctions in...Ch. 18.6 - We might be able to more easily distinguish...Ch. 18.6 - Paleontologists recently discovered fossil...Ch. 18.6 - describe the evolutionary history of humans and...Ch. 18.6 - name and describe some characteristics of the...Ch. 18.6 - describe the key features of the most recent phase...Ch. 18.6 - The unexpected discovery that humans interbred...Ch. 18 - Almost all of the oxygen gas in todays atmosphere...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - In the endosymbiotic origin of the mitochondrion,...Ch. 18 - Which of the following does not list evolutionary...Ch. 18 - Prob. 5MCCh. 18 - Because there was no oxygen in the earliest...Ch. 18 - The molecule _________ became a candidate for the...Ch. 18 - Complex cells that contain a nucleus and other...Ch. 18 - The Sperm of early land plants had to reach the...Ch. 18 - Prob. 5FIBCh. 18 - Prob. 6FIBCh. 18 - Prob. 7FIBCh. 18 - What is the evidence that life might have...Ch. 18 - How did the origin of photosynthesis affect...Ch. 18 - Explain the endosymbiont hypothesis for the origin...Ch. 18 - Name two advantages of multicellularity for plants...Ch. 18 - What advantages and disadvantages would...Ch. 18 - Prob. 6RQCh. 18 - Prob. 7RQCh. 18 - Extinctions have occurred throughout the history...Ch. 18 - In biological terms, what do you think was the...
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- Which of the following applies the theory that cells are the basic unit of structure and functioning of an organism? A.) Cells undergo mitotic division B.) The flower produces seedpod C.) The red blood cell lack nuclei to carry more oxygen C.) The bats evolve a wing in ordee to flyarrow_forwardWhat part of the cell contains the instructions for adaptations?arrow_forward1.) Which of the following is not part of the early cell theory? A)All organisms are multicellular. B)All organisms are made of one or more cells. C)The cell is the fundamental unit of life. D)All cells come from preexisting cells. 2) Which of the following features is not common to all cells? A)cell wall B)ribosomes C)RNA and DNA D)cytoplasm 3) Which of the following does not describe an organism in the domain bacteria? A)Has a typical cell size of 10-100 micrometers. B)Is considered a prokaryote. C)Can use a flagella to swim in fluids. D)Contains a nucleod region.arrow_forward
- How do simple multicellular organisms differ from complex multicellular organisms?arrow_forwardThe respiratory system, which includes the lungs, is responsible for taking in oxygen and expelling carbon dioxide. Which characteristic of life does such action fall under? A) Reproduction B) Regulation OC) Response to stimuli D) Adaptation OE) Organizationarrow_forwardWhat are the Multicellular organisms?arrow_forward
- Describe the advantages of multicellularity.arrow_forwardWhich observation proves that a cell is a eukaryote? A) It contains DNA B) It contains ribosomes C) It has a cell membrane D) It has DNA inside a nucleusarrow_forwardSuggest a hypothesis for the following observations: a) Living cells have contractile vacuole b) potatoes turn green when exposed to lightarrow_forward
- What are two ways that multicellular organisms may have originated?arrow_forwardWhile how the first cells formed is still unknown, scientists suspect that the first active biological macromolecule wasa. protein.b. DNA.c. RNA.d. carbohydrates.arrow_forwardThe multicellular body plan (demonstrated by the Porifera, sponges) are possible because of the evolution of specialized proteins that include? A) MEMBRANE PROTEINS (Adhering proteins) that bind the cell membranes together b)DNA c) hemoglobin d) glycogen and chitin e) chromosomes ?arrow_forward
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