Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 38, Problem 3TYU
Double fertilization means that
- (A) flowers must be pollinated twice to yield fruits and seeds.
- (B) every egg must receive two sperm to produce an embryo.
- (C) one sperm is needed to fertilize the egg, and a second sperm is needed to fertilize the polar nuclei.
- (D) every sperm has two nuclei.
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Human fertilization involves the fusion of two haploid gametes, producing a zygote containing (a) 23 chromosomes. (b) 46 chromosomes. (c) the normal haploid number of chromosomes. (d) 46 pairs of chromosomes.
If an egg cell were treated with EDTA, a chemical that bindscalcium and magnesium ions,(A) the acrosomal reaction would be blocked.(B) the fusion of sperm and egg nuclei would be blocked.(C) the fast block to polyspermy would not occur.(D) the fertilization envelope would not form.
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
Chapter 38 Solutions
Campbell Biology (11th Edition)
Ch. 38.1 - Distinguish between pollination and fertilization.Ch. 38.1 - Prob. 2CCCh. 38.1 - MAKE CONNECTIONS Does the life cycle of humans...Ch. 38.2 - What are three ways that flowering plants avoid...Ch. 38.2 - Prob. 2CCCh. 38.2 - Prob. 3CCCh. 38.3 - Compare traditional plant-breeding methods with...Ch. 38.3 - Why does Bt maize have less fumonisin than non-GM...Ch. 38.3 - WHAT IF? In a few species, chloroplast genes are...Ch. 38 - What changes occur to the four types of floral...
Ch. 38 - Prob. 38.2CRCh. 38 - Prob. 38.3CRCh. 38 - A fruit is (A) a mature ovary. (B) a mature ovule....Ch. 38 - Prob. 2TYUCh. 38 - Double fertilization means that (A) flowers must...Ch. 38 - Prob. 4TYUCh. 38 - Prob. 5TYUCh. 38 - A small flower with green petals is most likely...Ch. 38 - The black dots that cover strawberries are...Ch. 38 - DRAW IT Draw and label the parts of a flower.Ch. 38 - Prob. 9TYUCh. 38 - Prob. 10TYUCh. 38 - SCIENCE, TECHNOLOGY, AND SOCIETY Humans have...Ch. 38 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 38 - SYNTHESIZE YOUR KNOWLEDGE This colorized SEM shows...
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- Animals exhibiting external fertilisation produce a large number of gametes. Pick the appropriate reason from the following. (a) The animals are small in size and want to produce more offsprings. (b) Food is available in plenty in water. (c) To ensure better chance of fertilisation. (d) Water promotes production of large number of gametes.arrow_forwardI marked d but it's incorrect. Explain pleasearrow_forwardWhen it is 1.5 months old, an average embryo is the size of (a) a black bean, (b) an adult fist, (c) its mother’s nose, (d) the head of a common pin.arrow_forward
- Why is a second polar body expelled after fertilisation? a) To remove excess cytoplasm b) Because the oocyte must reactivate the incomplete meiosis before fusing with the sperm c) Before fusion with the sperm it must complete mitosis d) The fertilised oocyte is not a haploid cell until it expels the sperms mitochondriaarrow_forwardAnswer choices: A) Fertilization B) meiosis C) zygote D) gamete E) germ cellarrow_forwardWhich of the following characterizesparthenogenesis?(A) An individual may change its sex during itslifetime.(B) Specialized groups of cells grow into newindividuals.(C) An organism is first a male and then a female.(D) An egg develops without being fertilized.arrow_forward
- Of the three polar bodies , one came from an unequal division of the ovum , but from where did the other two arise ? a) What you really see are two polar bodies and the sperm that will fertilize the egg b ) One is an undeveloped primary oocyte that failed to mature . c ) The division of the first polar body into two polar bodies . d ) There were originally four polar bodies and one disappeared .arrow_forwardHow many meiotic divisions are required for the formation of 100 pollen grains ? (a) 100 (b) 50 (c) 25 (d) 26arrow_forwardOf the three polar bodies , one came from an unequal division of the ovum , but from where did the other two arise ? b ) A secondary division of the mature egg . c ) One is an undeveloped primary oocyte that failed to mature . d ) There were originally four polar bodies and one disappeared e)The division of the first polar body into two polar bodies .arrow_forward
- In females, meiosis is not completed (a) until birth. (b) until puberty. (c) until fertilization occurs. (d) until ovulation occurs.arrow_forwardThe Embryonic stem cells can be derived from _______ which is developed by “invitro fertilization”.a) late embryo b) early embryo c) embryo d) zygotearrow_forwardThe most notable differences between gamete formation in most animals and gamete formation in plants is that ______________. a) plants produce gametes in somatic tissue, whereas animals produce gametes in germ tissue b) plants produce gametes by mitosis, whereas animals produce gametes by meiosis c) plants produce only one of each gamete, but animals produce many gametes d) plants produce gametes that are diploid, but animals produce gametes that are haploidarrow_forward
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