BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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Chapter 44.5, Problem 3LO
Summary Introduction
To identify: The insect hormones involved in molting and metamorphosis.
Introduction: Insects have soft bodies with a chitinous exoskeleton. Insects have an endocrine system producing hormones. Hormones are chemicals messengers that are produced and circulated in the blood to regulate behavior, physiological, and
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Some salamanders exhibit neoteny, becoming sexually mature while still retaining some larval characteristics. In some species, the neotenic characteristics have become a permanent state of the species (obligate neoteny = paedogenesis; both are called paedomorphic conditions). These have lost the ability to undergo complete metamorphosis (hellbender, amphiuma, and mudpuppy). In others, the animal does not undergo complete metamorphosis in nature, but can be induced to do so in the lab. An example of this is the Mexican axolotl (Ambystoma mexicanum), a large gilled salamander found in Mexico. In some species of salamanders, members of a population exhibit neoteny only when they are under stressful environmental conditions (such as crowding, scarce food, low concentrations of trace elements). This is called facultative neoteny. Tiger Salamanders (Ambvstoma tigrinum) frequently do this, but local populations of marbled salamanders show a…
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Chapter 44 Solutions
BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
Ch. 44.1 - Prob. 1LOCh. 44.1 - Prob. 2LOCh. 44.1 - Prob. 3LOCh. 44.2 - Prob. 1LOCh. 44.2 - Prob. 2LOCh. 44.2 - Prob. 3LOCh. 44.3 - Prob. 1LOCh. 44.3 - Describe the connections between the hypothalamus,...Ch. 44.3 - Prob. 3LOCh. 44.4 - Prob. 1LO
Ch. 44.4 - Describe the components of Ca2+ homeostasis.Ch. 44.4 - Prob. 3LOCh. 44.5 - Prob. 1LOCh. 44.5 - Prob. 2LOCh. 44.5 - Prob. 3LOCh. 44 - Prob. 1DACh. 44 - Prob. 1IQCh. 44 - Which of the following best describes hormones? a....Ch. 44 - Steroid hormones a. can diffuse through the...Ch. 44 - Second messengers are activated in response to a....Ch. 44 - Which of the following is true about lipophilic...Ch. 44 - An organ is classified as part of the endocrine...Ch. 44 - Hormones released from the pituitary gland have...Ch. 44 - Prob. 7UCh. 44 - You think one of your teammates is using anabolic...Ch. 44 - Your Uncle Sal likes to party. When he goes out...Ch. 44 - Prob. 3ACh. 44 - Prob. 4ACh. 44 - Prob. 5ACh. 44 - You experience a longer period than normal between...Ch. 44 - Mild vitamin D deficiency can lead to...Ch. 44 - How can blocking hormone production decrease...Ch. 44 - Suppose that two different organs, such as the...Ch. 44 - Many physiological parameters, such as blood Ca2+...
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- Enlist modified mouthparts of insects with examples. Describe with figure the typical mouthpart of grasshopper.arrow_forwardClassify the following case as an r-strategist or a K-strategist Mayflies are an interesting insect. Adults emerge from the water with fully formed wings but with no mouthparts. Over the course of a few days, their only goal is to find a mate and lay eggs before they die. Females can deposit thousands of eggs in the water, which sink to the bottom sediments where they hatch. Nymphs hatch from the eggs and grow and develop on their own, spending one to three years under the surface of the water until they are ready to emerge from the water as adults.arrow_forwardExplain why frogs are restricted to a moist environment.arrow_forward
- Kindly refer to the photo. Thank youarrow_forwardQ26: Please type the answer this question Salamander larvae basically have a body form similar to the adult-elongated body, tail, and four legs. External gills are present. Fins and balancers are present on some species. Balancers are a pair of organs on the underside of either side of the head that keeps them upright in the water. During metamorphosis the gills and fins are lost, the gill slits close, there is a modification of skin for terrestrial existence, and lungs develop. Question: What do you notice about the development of the legs in salamander larvae. Which legs develop first? Is this different from the anuran larvae? (please answer both parts)arrow_forwardWrite in detail the common names of larvae and types of insect larvae along with examples. explain brieflyarrow_forward
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