To review:
The experimental design to determine the adverse effect of a new pesticide launched in the market on egg production and fertilization in frogs.
Introduction:
The chemical contamination of soil and water may acts as a major factor in amphibian population decline. The effects of organic and inorganic chemical contamination on amphibians like frogs may also depend on other biotic and abiotic variables at the time of exposure like UV-radiation. The pesticide endosulfan is an organochlorine cyclodiene which is extensively used in the world. The oxidation product, endosulphan sulphate is frequently transported into riverine environments. Frog embryos and larvae generally develop under the heterogeneous environments, and the concentration of different chemicals affects the various life cycle stages.
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Chapter 11 Solutions
Biology: The Dynamic Science (MindTap Course List)
- Which of the following steps of sea urchin fertilization initiates the formation of the fertilization envelope? A Acrosomal reaction Fast block to polyspermy Egg activation Cortical reaction Chemo-attractionarrow_forwardDiscuss the process and pathways of fertilzation in turtles. Also provide or show a diagram how does fertilization occur in female turtlesarrow_forwardBriefly discuss the role of hormonal system in the release of bovine eggs for in vitro fertilizationarrow_forward
- 2)Why are organisms that broadcast spawn useful for studying fertilization & development? a)Fertilization does not require multiple gametes b)Fertilization occurs outside the bodies of the parents, so it can be directly observed c)Fertilization is observable because the eggs are large enough to see d)Fertilization occurs without the need for parentsarrow_forwardgive one species that is classified or exhibit the following: infanticide show a picture of it with its sexual traits (body stuctures, behavior, etc) and how these traits help their reproduction. explain give one specific example please and explainarrow_forwardWhich statement below is FALSE regarding the differences between sea urchin and mammals? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a External fertilization is observed in sea urchins, whereas internal fertilization is used in mammals. External fertilization is observed in mammals, whereas internal fertilization is used in sea urchins. Urchins produce thousands of eggs, whereas humans produce only one egg that when fertilized becomes a zygote. Once sea urchins release their gametes, they move on to feeding on other normal activities and do not worry about their progeny at all. Unanswered A Submitarrow_forward
- Explain the advantages and disadvantages of self fertilization in these flatwormsarrow_forwardby looking at the picture above, describe the events that take place during fertilization of an embryoarrow_forwardPropose an experiment and suggest a control treatment for each of the following questions. Do bearded dragons that are genetically male chnage into females if eggs are incubated at temperatures above 32 C?arrow_forward
- Topic: Developmental Biology Give an analogy on how the concepts of determination and differentiation are seen in personal events in your life.arrow_forwardIn sea urchin, which step of egg and sperm recognition involves the formation of a fertilization cone? Sperm binding to the egg's vitelline membrane Fusion of the sperm and egg membranes Acrosomal reaction Chemo-attraction Sperm binding to the egg's jelly coatarrow_forwardEgg laying in fruit flies can be triggered (induced) when males transfer their sperm to females. Which of the following is a selective advantage of induced egg laying for the male flies? Less time and energy is expended by the male. The males do not have to produce as much sperm. More eggs can be fertilized. A male fly's sperm is more likely to be used for fertilization. Submit Request Answerarrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning