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1.1 The study of life Read Online
Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.
Chapter 26: Seed Plants MCQ Multiple Choices Questions Quiz Test Bank
26.1 Evolution of Seed Plants
26.2 Gymnosperms
26.3 Angiosperms
26.4 The Role of Seed Plants
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Question: Seed plants are ________.
Choices:
all homosporous.
mostly homosporous with some heterosporous.
mostly heterosporous with some homosporous.
all heterosporous.
Question: Pollen grains develop in which structure?
Choices:
the anther
the stigma
the filament
the carpel
Question: In the course of double fertilization, one sperm cell fuses with the egg and the second one fuses with ________.
Choices:
the synergids
the polar nuclei of the center cell
the egg as well
the antipodal cells
Question: Which of the following structures widens the geographic range of a species and is an agent of dispersal?
Choices:
seed
flower
leaf
root
Question: What is the ploidy of the following structures: gametophyte, seed, spore, sporophyte?
Choices:
1n, 1n, 2n, 2n
1n, 2n, 1n, 2n
2n, 1n, 2n, 1n
2n, 2n, 1n, 1n
Question: Megasporocytes will eventually produce which of the following?
Choices:
pollen grain
sporophytes
male gametophytes
female gametophytes
Question: Besides the seed, what other major structure diminishes a plant's reliance on water for reproduction?
Choices:
flower
fruit
pollen
spore
Question: In which of the following geological periods would gymnosperms dominate the landscape?
Choices:
Carboniferous
Permian
Triassic
Eocene (present)
Question: Which of the following traits characterizes gymnosperms?
Choices:
The plants carry exposed seeds on modified leaves.
Reproductive structures are located in a flower.
After fertilization, the ovary thickens and forms a fruit.
The gametophyte is longest phase of the life cycle.
Question: Which of the following structures in a flower is not directly involved in reproduction?
Choices:
the style
the stamen
the sepal
the anther
Question: In the northern forests of Siberia, a tall tree is most likely a:
Choices:
conifer
cycad
Gingko biloba
gnetophyte
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