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Biology_Set_10(1)

Question 1 of 35

What feature distinguishes vascular plants from nonvascular plants?

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Biology_Set_10(1) Practice Questions

Review these Biology_Set_10(1) nursing practice questions with answer choices and explanations.

Question 1

What feature distinguishes vascular plants from nonvascular plants?

  1. Specialized conducting tissues
  2. The presence of ribosomes
  3. The ability to contain DNA
  4. The absence of cells
View answer and explanation

Correct answer:

  1. Specialized conducting tissues

Explanation: Vascular plants contain xylem and phloem for transport.

Question 2

Why do mosses generally remain small and grow in moist locations?

  1. They contain no cell membranes
  2. They obtain energy only by fermentation
  3. They lack the specialized vascular tissues of vascular plants
  4. They have no chromosomes
View answer and explanation

Correct answer:

  1. They lack the specialized vascular tissues of vascular plants

Explanation: Their transport limitations and water-dependent reproduction favor small size and moist habitats.

Question 3

How do ferns commonly reproduce and disperse without seeds?

  1. By producing mammalian eggs
  2. By binary fission of the whole plant
  3. By producing spores
  4. By producing fruits
View answer and explanation

Correct answer:

  1. By producing spores

Explanation: Ferns produce spores that develop into another stage of their life cycle.

Question 4

Which feature characterizes gymnosperms?

  1. Complete absence of pollen
  2. Flowers with enclosed ovaries in every species
  3. Reproduction only by spores with no seeds
  4. Seeds not enclosed within an ovary-derived fruit
View answer and explanation

Correct answer:

  1. Seeds not enclosed within an ovary-derived fruit

Explanation: Gymnosperms bear unenclosed seeds, often on cone scales.

Question 5

Which feature identifies an angiosperm?

  1. Absence of embryos
  2. Production of bacterial endospores
  3. Flowers and seeds enclosed in fruits
  4. Lack of vascular tissue
View answer and explanation

Correct answer:

  1. Flowers and seeds enclosed in fruits

Explanation: Flowering plants produce seeds within structures that develop into fruits.

Question 6

What does the ovary of a flower usually develop into after fertilization?

  1. A root hair
  2. A fruit
  3. A pollen grain
  4. A stamen
View answer and explanation

Correct answer:

  1. A fruit

Explanation: The ovary develops into a fruit that surrounds or carries the seeds.

Question 7

Which flower structure produces pollen?

  1. Sepal
  2. Stigma
  3. Ovary
  4. Anther
View answer and explanation

Correct answer:

  1. Anther

Explanation: Anthers are the pollen-producing parts of stamens.

Question 8

Which flower structure receives pollen during pollination?

  1. Petal
  2. Stigma
  3. Root cap
  4. Filament
View answer and explanation

Correct answer:

  1. Stigma

Explanation: The stigma provides the receptive surface for pollen.

Question 9

What is the main function of a pollen tube?

  1. Delivering sperm cells toward the ovule
  2. Transporting water through xylem
  3. Making the flower's petals
  4. Absorbing minerals from soil
View answer and explanation

Correct answer:

  1. Delivering sperm cells toward the ovule

Explanation: The tube grows through female tissues and carries sperm cells to the fertilization site.

Question 10

What is a cotyledon?

  1. A bacterial flagellum
  2. An embryonic seed leaf
  3. A root's protective cap
  4. A flower's pollen-producing organ
View answer and explanation

Correct answer:

  1. An embryonic seed leaf

Explanation: Cotyledons are part of the embryo and may store or absorb food for the seedling.

Question 11

Which structure protects the growing tip of a root?

  1. Anther
  2. Leaf blade
  3. Root cap
  4. Stigma
View answer and explanation

Correct answer:

  1. Root cap

Explanation: The root cap shields delicate tissues as the root pushes through soil.

Question 12

Where does primary growth that lengthens shoots and roots mainly occur?

  1. Dead cork cells
  2. Apical meristems
  3. Mature xylem vessels
  4. Fully expanded petals
View answer and explanation

Correct answer:

  1. Apical meristems

Explanation: Apical meristems at tips generate cells that contribute to lengthening.

Question 13

Which tissue contributes to increased stem thickness in many woody plants?

  1. Anther wall
  2. Root cap
  3. Leaf epidermis only
  4. Vascular cambium
View answer and explanation

Correct answer:

  1. Vascular cambium

Explanation: The vascular cambium produces secondary xylem and phloem.

Question 14

What is the waxy cuticle on a leaf mainly used for?

  1. Absorbing soil minerals
  2. Reducing water loss
  3. Producing pollen
  4. Replacing chlorophyll
View answer and explanation

Correct answer:

  1. Reducing water loss

Explanation: The cuticle limits evaporation from the leaf surface.

Question 15

Why might a plant close its stomata during a hot dry period?

  1. To increase evaporation as much as possible
  2. To reduce water loss
  3. To double its chromosome number
  4. To eliminate all stored sugar
View answer and explanation

Correct answer:

  1. To reduce water loss

Explanation: Closing stomata conserves water, although it also limits carbon dioxide entry.

Question 16

Roots growing downward in response to gravity demonstrate what?

  1. Pollination
  2. Negative gravitropism
  3. Positive gravitropism
  4. Positive phototropism
View answer and explanation

Correct answer:

  1. Positive gravitropism

Explanation: Growth toward the direction of gravity is positive gravitropism.

Question 17

A climbing plant coils around a support after touching it. What response is this?

  1. Thigmotropism
  2. Plasmolysis
  3. Transcription
  4. Fermentation
View answer and explanation

Correct answer:

  1. Thigmotropism

Explanation: Thigmotropism is directional growth in response to contact.

Question 18

Why do many wind-pollinated plants produce abundant lightweight pollen?

  1. Much pollen is dispersed without reaching a suitable stigma
  2. Wind prevents pollen movement
  3. Every grain must become a fruit immediately
  4. Their pollen has no genetic material
View answer and explanation

Correct answer:

  1. Much pollen is dispersed without reaching a suitable stigma

Explanation: Producing many airborne grains increases the chance of successful transfer.

Question 19

Which leaf tissue is commonly packed with chloroplasts and performs much photosynthesis?

  1. Palisade mesophyll
  2. Root cap
  3. Cork
  4. Mature xylem vessel interiors
View answer and explanation

Correct answer:

  1. Palisade mesophyll

Explanation: Palisade cells contain many chloroplasts and absorb substantial light.

Question 20

What helps pull water upward through xylem in a transpiring plant?

  1. Protein digestion in roots
  2. ATP-driven pumping by every dead vessel cell
  3. Movement of pollen
  4. Evaporation from leaves combined with cohesion of water
View answer and explanation

Correct answer:

  1. Evaporation from leaves combined with cohesion of water

Explanation: Transpiration creates tension that is transmitted through cohesive water columns.

Question 21

Which process converts atmospheric nitrogen into compounds that organisms can use?

  1. Translation
  2. Pollination
  3. Nitrogen fixation
  4. Transpiration
View answer and explanation

Correct answer:

  1. Nitrogen fixation

Explanation: Certain microorganisms convert nitrogen gas into biologically usable forms such as ammonia.

Question 22

What is a mycorrhizal association?

  1. A relationship between a fungus and plant roots
  2. A plant cell lacking a membrane
  3. A virus living in a ribosome
  4. A bacterial endospore
View answer and explanation

Correct answer:

  1. A relationship between a fungus and plant roots

Explanation: Mycorrhizal fungi often aid mineral uptake while receiving organic nutrients from the plant.

Question 23

How do fungi generally obtain nutrients?

  1. By external digestion followed by absorption
  2. By converting oxygen directly into glucose
  3. By swallowing food with a mouth
  4. By photosynthesis in all species
View answer and explanation

Correct answer:

  1. By external digestion followed by absorption

Explanation: Fungi release digestive enzymes and absorb the resulting small molecules.

Question 24

What is a hypha?

  1. A threadlike fungal filament
  2. A plant seed leaf
  3. A viral envelope
  4. A human blood vessel
View answer and explanation

Correct answer:

  1. A threadlike fungal filament

Explanation: Hyphae are tubular filaments that form much of a fungus's body.

Question 25

What is a mycelium?

  1. The coat of a virus
  2. A single pollen grain
  3. A cluster of human chromosomes
  4. A network of fungal hyphae
View answer and explanation

Correct answer:

  1. A network of fungal hyphae

Explanation: Interconnected hyphae form a mycelium that grows through its food source.

Question 26

Which substance is a major component of fungal cell walls?

  1. Hemoglobin
  2. Cholesterol
  3. Chitin
  4. Glycogen alone
View answer and explanation

Correct answer:

  1. Chitin

Explanation: Chitin contributes to the strength of fungal cell walls.

Question 27

Which characteristic distinguishes animals from plants and fungi in general?

  1. Being eukaryotic
  2. Having ribosomes
  3. Having DNA
  4. Obtaining food primarily by ingestion
View answer and explanation

Correct answer:

  1. Obtaining food primarily by ingestion

Explanation: Animals typically ingest food, whereas fungi absorb nutrients and plants usually photosynthesize.

Question 28

An animal lacks a vertebral column. It is classified as what?

  1. A gymnosperm
  2. A vertebrate
  3. An invertebrate
  4. A prokaryote
View answer and explanation

Correct answer:

  1. An invertebrate

Explanation: Invertebrates are animals without a backbone.

Question 29

What is bilateral symmetry?

  1. A body plan with corresponding left and right halves
  2. A body divisible into similar halves around any central plane
  3. A body with no organized shape
  4. A body with two nuclei in every cell
View answer and explanation

Correct answer:

  1. A body plan with corresponding left and right halves

Explanation: Bilateral symmetry has one main plane separating matching left and right sides.

Question 30

Which feature is characteristic of arthropods?

  1. Seeds enclosed in fruit
  2. Jointed appendages and an exoskeleton
  3. Absence of body segmentation in every species
  4. A vertebral column in every species
View answer and explanation

Correct answer:

  1. Jointed appendages and an exoskeleton

Explanation: Arthropods include insects, spiders, and crustaceans with jointed limbs and external skeletons.

Question 31

Which trait is characteristic of mammals?

  1. Gills throughout adulthood in every species
  2. Mammary glands
  3. Feathers
  4. Cellulose cell walls
View answer and explanation

Correct answer:

  1. Mammary glands

Explanation: Mammary glands produce milk to nourish young.

Question 32

Which trait is unique to living birds among major animal groups?

  1. A backbone
  2. Lungs
  3. Internal organs
  4. Feathers
View answer and explanation

Correct answer:

  1. Feathers

Explanation: Feathers distinguish birds from other living animal groups.

Question 33

Which major group contains multicellular eukaryotes that usually perform photosynthesis and have cellulose walls?

  1. Fungi
  2. Bacteria
  3. Plants
  4. Animals
View answer and explanation

Correct answer:

  1. Plants

Explanation: These features characterize members of the plant kingdom in introductory classification.

Question 34

Why are scientific names useful?

  1. They describe only an organism's color
  2. They provide a standardized way to identify species across languages
  3. They eliminate the need for evidence
  4. They prevent all species from evolving
View answer and explanation

Correct answer:

  1. They provide a standardized way to identify species across languages

Explanation: Standard names reduce confusion caused by different common names.

Question 35

Which formatting correctly follows binomial naming conventions?

  1. Family name followed by an organ name
  2. Species epithet written before genus
  3. Both words always uppercase
  4. Genus capitalized and species epithet lowercase, both italicized
View answer and explanation

Correct answer:

  1. Genus capitalized and species epithet lowercase, both italicized

Explanation: A binomial uses a capitalized genus followed by a lowercase specific epithet, normally in italics.