Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 24, Problem 3MCQ
What are the pro ducts of double fertilization?
- a. Two diploid zygotes
- b. A diploid zygote and a triploid endosperm
- c. A haploid sperm and a diploid zygote
- d. A triploid zygote
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What are the products of double fertilization?a. Two diploid zygotesb. A diploid zygote and a triploid endospermc. A haploid sperm and a diploid zygoted. A triploid zygote
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- What is the flower symmetry of a yellow bell? Why? a. Bilateral/ Zygomorphic b. Actinomorphic/ Radialarrow_forwardHow would a loss-of-function mutation in the α-amylase gene affect seed germination? a. The seed could not imbibe water. b. The embryo would starve. c. The seed coat would not rupture. d. The seed would germinate prematurely.arrow_forwardWhich suite of reproductive features distinguishes angiosperms from gymnosperms? A. The carpel, double fertilisation, endosperm formation B. Pollen-formation, double fertilisation, seed-formation C. Pollen-formation, the carpel, double fertilisation, endosperm formation D. The carpel, double fertilisation, endosperm formation, seed-formationarrow_forward
- The production of which structure in a flowering plant involves genetic recombination? A. haploid gametes B. haploid spores C. diploid gametes D. diploid sporesarrow_forwardHow does double fertilization occur in flowering plants?a. The two sperm in a pollen tube fertilize the two egg cells present ineach female gametophyte.b. One of the two sperm in a pollen tube fertilizes the single egg in afemale gametophyte, and the other fuses with the two nuclei presentin the central cell.c. Two sperm, one contributed by each of two different pollen tubes,fertilize the two egg cells in a single female gametophyte.d. Two sperm contributed by separate pollen tubes enter a singlefemale gametophyte; one of the sperm fertilizes the egg cell, and theother fertilizes the central cell.e. None of the above is correct.arrow_forwardIn which part of the female flowerdoes fertilisation take place?A. FilamentB. StigmaC. OvaryD. Stylearrow_forward
- It is in the plants that mature cells can revert to what undifferentiated state? A. callus B. gametes C. stem cells D. totipotent cellsarrow_forwardDescribe the process of double fertilization in angiosperms and add a note on its significance.arrow_forwardA yellow dust appears on the fingers, whenever we touch the middle of a flower. These tiny yellow grains are one of the most precious substances in nature because they contain the secret of plant life. What is this dust called? A. Pollen B. Sperm C. Spore D. Sporocystarrow_forward
- Fill in the blank with the term that best completes the sentence. 21. Switching between a haploid gametophyte stage and a diploid sporophyte stage is called 22. gives plant stems stiffness and helps protect plants against predators. 23. Nonvascular plants use for absorbing water. 24. Asexual reproduction from stems, leaves, or roots is called occurs when a growing plant embryo bursts through the seed coat. 25. 26. Liverworts, hornworts, and mosses are all plants. 27. Another name for vascular plants i , 28. stores food in seed plants. 29. In a flower the contains the stigma, style, and ovary. 30. The protects the seed.arrow_forwardWhich of the following pairs of plant structure has the haploid number ofchromosomes? A. Megaspore mother cell and antipodal cells B. Egg cell and antipodal cells C. Egg cell and endosperms D. Microspore mother cell and antipodal cellsarrow_forwardIf tall stems is dominant to short stems in pansies, what type of stem will the offspring of a tall plant and a short plant have? a. Tall b. Short c. Averagearrow_forward
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