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Biology 152 - Exam 3 With Questions And Correct Answers Latest Version
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Biology 152 - Exam 3 With Questions And Correct Answers Latest Version
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Biology 152 - Exam 3 With Questions AndCorrect Answers Latest Version
Vasculature Answer: Arranged in long, discrete strands called vascular bundles. These bundles
include both xylem and phloem, as well as supporting and protective cells.
Stomata Answer: Pores in the leaves that let CO2 in and O2 and H2O out
Xylem Answer: Vessels that are dead cells and transport water, soil & minerals; is under negative
pressure.
Direction of transport is always up towards the leaves.
Phloem Answer: Vessels that are alive cells at maturity and transport sugars and hormones; goes
from source to sink.
Direction of transport can be either up or down.
Plasmodesmata Answer: Sieve elements that help connect and keep connection between phloem
cells and the cells around them (transport-wise).
Positive Pressure Answer: "Pushing out" of a substance.
Negative Pressure Answer: Tension; pulling up of a substance.
Source Answer: In plants, these are regions that produce or store carbohydrates.
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,Example: Leaves & Potato tubers.
Sink Answer: In plants, these are portions that needs carbohydrates to fuel growth and respiration.
Examples: Roots, Young leaves & Developing fruits
Angiosperm Answer: These are flowering plants. They possess vascular tissue and produce seeds
and fruit.
Pollen Answer: Is the multicellular male gametophyte contained withing the spore walls
How do most plants reproduce? Answer: Asexually.
Ploidy Answer: Te number of copies/sets of chromosomes an individual has,
E.g. Haploid, Diploid, Tetraploid.
Gametophyte Answer: The haploid multicellular generation that gives rise to gametes.
Sporophyte Answer: The diploid, multicellular, spore producing plant generation that give rise to
spores.
Spore Answer: Haploid cells that disperse and give rise to a new haploid generation
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, Alternation of generation Answer: The resulting life cycle in which a haploid gametophyte and a
diploid sporophyte follow one after another.
Double fertilization Answer: In angiosperms, one sperm fertilizes the egg to form the 2n zygote,
while the other sperm fuses with two polar nuclei to form the 3n endosperm.
Endosperm Answer: Fatty and full of protein.
What feeds the embryo while it is dormant in the seed?
Fruit Answer: the seed-bearing structure in angiosperms formed from the ovary after flowering; the
edible, usually fleshy and sweet smelling part of a plant that may or may not contain seed(s); fleshy
carpel.
Seed Answer: An ovule, when fertilized, develops into a ______. _______ are multicellular
structures that allow offspring to disperse away from the parent plant.
Animal Answer: Generalized Characteristics:
1. Mostly heterotrophic
2. Eukaryotic
3. Multicellular
4. Lack cell walls
5. Development is governed by HOX genes
6. Most have muscle/nerve cells
7. Most reproduce sexually
8. Most move
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