Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Chapter 15, Problem 28CTQ
During embryonic development, what features do we share with tunicates or lancelets?
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Which of the following best describes why it is difficult to develop antiviral drugs? Explain why.
A. antiviral drugs are very difficult to develop andhave no side effects
B. viruses are difficult to target because they usethe host cell’s enzymes and ribosomes tometabolize and replicate
C. viruses are too small to be targeted by drugs
D. viral infections usually clear up on their ownwith no problems
This question has 3 parts (A, B, & C), and is under the subject of Nutrition. Thank you!
They got this question wrong the 2 previous times I uploaded it here, please make sure it's correvct this time.
Chapter 15 Solutions
Concepts of Biology
Ch. 15 - Figure 15.3 Which of the following statements is...Ch. 15 - Figure 15.24 Which of the following statements...Ch. 15 - Figure 15.33 Which of the following statements...Ch. 15 - Which of the following is not a feature common to...Ch. 15 - Which of the following does not occur? a. radially...Ch. 15 - The large central opening in the poriferan body is...Ch. 15 - Cnidocytes are found in _____. a. phylum Porifera...Ch. 15 - Cubozoans are______. a. polyps b. medusoids c....Ch. 15 - Which group of flatworms are primarily external...Ch. 15 - Crustaceans are _____. a. ecdysozoans b. nematodes...
Ch. 15 - A mantle and mantle cavity are present in _____....Ch. 15 - Annelids have a ______. a. pseudocoelom b. a true...Ch. 15 - Echinoderms in their larval state have ______. a....Ch. 15 - The circulatory fluid in echinoderms is _____. a....Ch. 15 - Which of the following is not a member of the...Ch. 15 - Members of Chondrichthyes differ from members of...Ch. 15 - Squamata includes _____. a. crocodiles and...Ch. 15 - Sudoriferous glands produce______. a. sweat b....Ch. 15 - Which of the following is a Monotreme? a. kangaroo...Ch. 15 - How are specialized tissues important for animal...Ch. 15 - Using the following terms, explain what...Ch. 15 - Describe the feeding mechanism of sponges and...Ch. 15 - Compare the structural differences between...Ch. 15 - Speculate as to what advantage(s) a complete...Ch. 15 - Describe a potential advantage and disadvantage of...Ch. 15 - Describe the morphology and anatomy of mollusks.Ch. 15 - Sessile adult tunicates lose the notochord; what...Ch. 15 - During embryonic development, what features do we...Ch. 15 - What can be inferred about the evolution of the...Ch. 15 - Explain why frogs are restricted to a moist...Ch. 15 - Describe three adaptations that allow for flight...
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- This question has multiple parts (A, B & C), and under the subject of Nutrition. Thank you!arrow_forwardCalculate the CFU/ml of a urine sample if 138 E. coli colonies were counted on a Nutrient Agar Plate when0.5 mls were plated on the NA plate from a 10-9 dilution tube. You must highlight and express your answerin scientific notatioarrow_forwardDon't copy off the other answer if there is anyarrow_forward
- Use the following information to answer the question(s) below. Martin Wikelski and L. Michael Romero (Body size, performance and fitness in Galápagos marine iguanas, Integrative and Comparative Biology 43 [2003]:376-86) measured the snout-to-vent (anus) length of Galápagos marine iguanas and observed the percent survival of different-sized animals, all of the same age. The graph shows the log snout-vent length (SVL, a measure of overall body size) plotted against the percent survival of these different size classes for males and females. Survival (%) 100- 80- 60- 40- 20- 0+ 1.9 T 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Log SVL (mm) 19) Examine the figure above. What type of selection for body size appears to be occurring in these marine iguanas? A) directional selection B) stabilizing selection C) disruptive selection D) You cannot determine the type of selection from the above information. 3arrow_forward24) Use the following information to answer the question below. Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. They identify the gene responsible for toxin production. The dominant allele (T) codes for an enzyme that makes the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin. Heterozygotes produce an intermediate amount of toxin. The genotypes of all individuals in the population are determined (see table) and used to determine the actual allele frequencies in the population. TT 0.49 Tt 0.42 tt 0.09 Refer to the table above. Is this population in Hardy-Weinberg equilibrium? A) Yes. C) No; there are more homozygotes than expected. B) No; there are more heterozygotes than expected. D) It is impossible to tell.arrow_forward30) A B CDEFG Refer to the accompanying figure. Which of the following forms a monophyletic group? A) A, B, C, and D B) C and D C) D, E, and F D) E, F, and Garrow_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY