WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 11, Problem 10MC
Summary Introduction
Introduction:
Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.
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Compare and contrast sexual and asexual reproduction. Identify the most accurate statement.
a.
Asexual reproduction results in more offspring per mother.
b.
Sexual reproduction is always more costly.
c.
Sexual reproduction is associated with an increase in homozygosity.
d.
Asexual reproduction is always bad for a species.
Compared with external fertilization, in internal fertilization,a. male gametes have a higher chance to come into close proximity tofemale gametes.b. gametes are less protected against predation or other harmfulenvironmental factors.c. there is a decreased likelihood of desiccation of gametes.d. gametes come into contact only outside the mother’s reproductivetract.e. Both b and c are true of internal fertilization.
A.
Water currents in the ocean are much stronger than any sperm. How do sperm and egg find each other?
B.
In humans there are no water currents and the volume of the female reproductive tract is relatively limited. Then, why does the male have so many sperm?
C.
Why do sea urchins have external fertilization?
D.
Then why don't the parents take care of the young?
E.
Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?
Chapter 11 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Unchanging environments are advantageous to organismsa. that reproduce asexually.b. that undergo indirect development.c. in which fertilization occurs internally.d. that undergo pattern formation.arrow_forwardDiscuss the process and pathways of fertilzation in turtles. Also provide or show a diagram how does fertilization occur in female turtlesarrow_forwardIn humans, mammals and many other chordates sexual reproduction takes place by fusion of large immobile ovum and small motile sperm. This kind of sexual reproduction is: Select one: a. Isogamy b. Schizogony c. Oogamy d. Conjugation e. Polytenyarrow_forward
- Which of the following is not true about starfish eggs? Choose all possible answers a. eggs are fertilized prior to completion of the first meiotic divisions. b. eggs are generally less yolky and therefore cleave meroblastically. c. first two cleavage planes are meridional d. Each quartet (blastomeres) occupies a plane lying perpendicular to the animal-vegetal axis. e. All are true about the starfish eggs.arrow_forwardgive one species that is classified or exhibit the following: male to male combat show a photograph of it with its sexual traits (body stuctures, behavior, etc) and how these traits help their reproduction. explainarrow_forwardWhich of the following correctly describes hermaphroditism? A. It is an example of sexual reproduction because it involves a male and a female. B. It is an example of asexual reproduction because only one individual needs to be involved. C. It is an example of sexual reproduction because it involves fusion of two gametes. D. It is an example of asexual reproduction because the offspring are genetically identical to the parent.arrow_forward
- Which among these insects secrete seducin by the male which both attracts andpacifies the untamed female so that a connection is established?A. Bombus lapidaries.B. Periplaneta Americana.C. Eciton burchellii.D. Nauphota cinerae. How would you classify the type of ovariole of the following orders Neuroptera,Lepidoptera, some Coleoptera, Diptera andHymenoptera?A. polytrophic type of ovarioleB. telotrophic type of ovarioleC. panoistic type of ovarioleD. both B and C Which part of the egg is closely associated to the chorion?A. yolk deutoplasmB. vitelline membraneC. nuclear cytoplasmD. periplasm What is the major control centers of oogenesis that secretes ecdysone?A. headB. fat bodiesC. ovariesD. corpora allataarrow_forwardUniquely explain the relationship between primate mating groups and sexual dimorphism in your own words.arrow_forwardChimpanzee males have large testes for their body size. One widely accepted theory proposed to explain this feature is that it is … A. a form of male dominance display. B. a response to the large estrus swelling in females. C. necessary because chimpanzee females have low fertility. D. a consequence of sperm competition. E. attractive to female chimpanzees.arrow_forward
- C. Why do sea urchins have external fertilization? D. Then why don't the parents take care of the young? E. Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?arrow_forwardWhy are sea urchins have external fertilization? What are the adaptive advantages of external fertilization? How about internal fertilization?arrow_forwardWhich of the following statements is TRUE? A. Animals with indirect development requires external fertilization and an aquatic environment B. Protandry refers to species that begins life as male but later on transforms into females C. Parthenogenesis is a form of sexual reproduction di D. Animals may reproduce either sexually or asexually but never botharrow_forward
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