What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 25, Problem 2MC
Summary Introduction
Introduction:
Amplexus is the mating position that frogs use, putting the male and female in close proximity even though fertilization does not occur within the female.
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5)What is the primary purpose of the fertilization membrane?
a)Provide the growing embryo with food
b)Serve as a barrier to protect the zygote from the environment
c)Prevent multiple sperm from attempting to merge with an egg
d)Hold the cells together when the zygote begins undergoing cell division
e)None of these options is correct
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 parents
1)Development is just another name for fertilization
a)True
b)False
4)A fertilized egg is the same as a zygote
a)True
b)False
Chapter 25 Solutions
What is Life? A Guide to Biology with Physiology
Ch. 25 - Prob. 1SACh. 25 - Prob. 2SACh. 25 - Prob. 3SACh. 25 - Prob. 4SACh. 25 - Prob. 5SACh. 25 - Prob. 6SACh. 25 - Prob. 7SACh. 25 - Prob. 8SACh. 25 - Prob. 9SACh. 25 - Prob. 10SA
Ch. 25 - Prob. 11SACh. 25 - Prob. 12SACh. 25 - Prob. 13SACh. 25 - Prob. 14SACh. 25 - Prob. 15SACh. 25 - Prob. 1MCCh. 25 - Prob. 2MCCh. 25 - Prob. 3MCCh. 25 - Prob. 4MCCh. 25 - Prob. 5MCCh. 25 - Prob. 6MCCh. 25 - Prob. 7MCCh. 25 - Prob. 8MCCh. 25 - Prob. 9MCCh. 25 - Prob. 10MCCh. 25 - Prob. 11MCCh. 25 - Prob. 12MCCh. 25 - Prob. 13MCCh. 25 - Prob. 14MCCh. 25 - Prob. 15MC
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- 6) Classify the following as either Sexual or Asexual Reproduction. Give the specific type of asexual reproduction. a) A small piece of a cactus breaks off the plant, falls to the ground, and begins to grow. b) Pollen from a male poplar tree fertilizes sex cells on a female poplar tree. c) Two earthworms each produce sperm and eggs and fertilize each other. d) A flatworm is cut in half and grows into two flatworms.arrow_forwardWhich of the following cell part is absent in a human spermatozoon? A) nucleus C) cell membrane B) cytoplasmarrow_forward1) Which statement below about asexual reproduction is FALSE? a) With asexual reproduction, offspring are genetically equivalent to the parent b) Asexual reproduction requires no partner c) Asexual reproduction requires meiosis d) Some organisms can reproduce both sexually and asexuallyarrow_forward
- Why is the ovum so much bigger than a sperm cell? 1)It already contains all the chromosomes that will determine the zygote's traits. 2)It must store enough food for the growth of the zygote into an embryo. 3)Its big size allows the sperm to locate it better inside the oviduct. 4)A big ega is easier to implant in the uterus after tertilization.arrow_forwardThe Mullerian ducts in female mammalian embryos develop into… a) The vas deferens b) The ovaries c) The oviduct and uterus d) The vagina e) The fimbriaarrow_forwardIn protandrous hermaphroditism _____. A) Some individuals may change from male to female B) Males rather than females release pheromones C) Individuals fertilize themselves D) Diploid ova are produced E) The adult gonads are undifferentiatedarrow_forward
- In Deuterostomes, nutrient molecules (monomers) are taken in to the space between the endoderm and the ectoderm because... A) The ectoderm makes protein for movement B) The endoderm cells release hydrolytic enzymes that act on polymers C) The endoderm releases enzymes that conduct dehydration synthesis of proteins D) mRNA polymerase causes hydrolysis of DNA E) All are correct Explain whyarrow_forwardIn identifying the marginal cells of the tunicate embryo, which of the following is the role of the Macho- 1 gene? Choose all possible answers. a) suppresses notochord induction in mesenchymal cell progenitors b) a determinant that not only activates muscles but also distinguishes cell responses to the FGF signal c) can alter the responses to endodermal FGFs d) none of the abovearrow_forwardIf the ovum is not fertilized, the corpus luteum regresses, and the endometrium sloughs off to result in the first day of menstrual bleeding. The latter event would be duplicated, even if fertilization occurred, if receptors for which of the following hormones were occupied by an antagonist? A) Dehydroepiandrosterone B) Estradiol C ) Estriol D) Estrone E) Progesteronearrow_forward
- Spermatogenesis and oogenesis both involve meiosis but differ in significant ways. One of those differences include what? A) Cytokinesis is unequal in spermatogenesis B) Production of sperm is continuous; in humans, and the number of future egg cells is set at birth C) Oogenesis is an uninterrupted sequence, but there are long delays in spermatogenesis D) All of the abovearrow_forwardWhich of the following statements are false? A) An oocyte completes meiosis after a sperm penetrates it. B) The earliest stages of spermatogenesis occur closest to the lumen of the seminiferous tubules. C) Fertilization occurs in the oviduct. D) Effective hormonal contraceptives are currently available only for females. E) Spermatogenesis and oogenesis require different temperatures. F) Fragmentation is a type of asexual reproduction wherein an organism produces gemmules which are collections of many cells surrounded by a body wall. G) Lobsters and insects can reproduce via fragmentation.arrow_forwardWhich of the following statements is incorrect? a) Sperm occur as X- or Y-chromosome bearing gametes b) The sex of an individual can not be determined from morphology early in embryonic development c) It is the ovum which determines the sex of the newly developing embryo d) X-chromosome bearing sperm are slightly larger than Y-chromosome bearing spermarrow_forward
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