BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 21, Problem 9SA
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| a. pollen | c. fruits |
| b. seeds | d. all of the above |
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The seed coat forms from the______ . a. integuments c. endosperm b. coleoptile d. sepals
Exposure to______ can trigger seed germination. a. light c. smoke b. cold d. all can be triggers
Most gymnosperm seeds _______________.
Select one:
a.
have attached wings to aid in dispersal
b.
grow as groups in thick pouches inside of woody cones
c.
have very little viability
d.
possess no seed coat
e.
none of the above answers
f.
have triploid endosperm, the product of double fertilization
Chapter 21 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 21 - The first plants were_________. a. ferns c....Ch. 21 - Which of the following statements is false? a....Ch. 21 - In bryophytes, eggs are fertilized in a chamber on...Ch. 21 - Prob. 4SACh. 21 - Coal consists primarily of compressed remains of...Ch. 21 - Prob. 6SACh. 21 - Prob. 7SACh. 21 - Prob. 8SACh. 21 - Only angiosperms produce_______. a. pollen c....Ch. 21 - The _______do not have xylem or phloem. a. mosses...
Ch. 21 - Prob. 11SACh. 21 - Prob. 12SACh. 21 - Prob. 13SACh. 21 - Prob. 14SACh. 21 - Prob. 15SACh. 21 - Early botanists admired ferns but found their life...Ch. 21 - In animals, meiosis of germ cells produces...Ch. 21 - In most plants the largest, longest-lived body is...Ch. 21 - Consider a cherry pit, which is a seed with a...Ch. 21 - Suppose you wanted to make a science fiction film...
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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
- A seed is a(n)_______ . a. female gametophyte c. mature pollen tube b. mature ovule d. immature microsporearrow_forwardAfter double fertilization, a zygote and ________ form. a. an ovule b. endosperm c. a cotyledon d. a suspensorarrow_forwardThe arrival of pollen grains on a receptive stigma is called_____ . a. germination c. pollination b. fertilization d. propagationarrow_forward
- Domesticated banana plants produce seedless fruit because they are______ . a. triploid d. propagated by grafting b. monocots e. treated with colchicine c. endangered f. infected with Phylloxeraarrow_forwardMatch the terms appropriately. ___ ovule a. gamete-producing body ___ cuticle b. spore-producing body ___ gametophyte c. where eggs form ___ sporophyte d. underground stem ___ fruit e. mature ovary ___ endosperm f. nutritive tissue in seed ___ rhizome g. where fern spores form ___ sorus h. secreted waxy layerarrow_forwardFamily Clusiaceae A. Leaf type:____ B. Flower characteristics:____ C. Seed morphology:____ Family Dipterocarpaceae A. Plant habit:_____ B. Seed morphology:____arrow_forward
- Meiosis of cells in pollen sacs forms haploid______ . a. megaspores c. stamens b. microspores d. sporophytesarrow_forward19. all of these plants have tap root system except _____ a. banana b. mango c. radish d. dandelion 20. which of the following describes seed plants l. consists of a tests that protects the embryo ll. identical to spermatophytes lll. comprised of the gymnosperms and angiosperms a. l, ll b. ll, lll c. l, ll, lll d. l, lllarrow_forwardThe small opening in the integument(s) of the angiosperm egg sac through which the pollen tube enters is known as the _________. Select one: a. Microtubule b. Megapyle c. Venter d. Neck-ring cells e. Micropyle f. none of these choicesarrow_forward
- Seeds are mature_____ ; fruits are mature_____ . a. ovaries; ovules c. ovules; ovaries b. ovules; stamens d. stamens; ovariesarrow_forwardбуmnosperms Type of spore formed by heterosporous species which give rise to female gametophytes. A. Hetrospores B. Mergasporngiav C. Homospores D. Megasporesarrow_forwardWhich of the following is NOT regulated by Gibberellins? seed germination a. b. fruit growth gravitropism Oc. stem elongation d.arrow_forward
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