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BIO 150 Exam 3 Verified 2024
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BIO 150 Exam 3 Verified 2024
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BIO 150 Exam 3 Verified 2024Can animals only feed at one trophic level? - ANSWER-No
Do fish lay more or less eggs than broadcast spawners? - ANSWER-Less
Do gametes form in asexual reproduction? - ANSWER-No
Does self-fertilization or cross-fertilization produce more diverse offspring? - ANSWER-
Cross-fertilization
Does sexual reproduction always involve 2 individuals? - ANSWER-No
Does the probability of dying increase with age? - ANSWER-Yes
Example of a primary producer - ANSWER-yucca plant
Example of herbivore - ANSWER-jackrabbit
Example of mesopredators - ANSWER-coyote
How are micronutrients important? - ANSWER-micronutrients/trace elements are
ions/elements in the environment (like Mg or Fe)
How can molecules enter diffusion? - ANSWER-Some small particles come in via
simple diffusion
a) other particles flow thru channels
b) brought thru by carriers
How can roots be even more efficient? - ANSWER-Mutalism
How do plants acquire & transport nutrients? - ANSWER-2 general body systems
1. Root system (absorption), storage, transport, anchorage, hormones
2. Shoot system (photosynthesis), storage, transport, reproduction, hormones
How do roots work? - ANSWER-1. Absorb minerals from soil, along w/ H2O
2. Mins dissolve in H2O
3. Transported thru xylem
How do single-celled organisms move? - ANSWER-Often can move, but not far &
usually not directed motion
Ex: marine unicellular organisms often at mercy of currents
- move from deeper --> shallower water
How do sugars move? - ANSWER-Bulk flow due to higher P at source than at sink
,How do terrestrial plants do water transport? - ANSWER-Xylem tissue: Dead, elongated
cells
- cell walls form hollow tubes like straws
How do unicellular species regulate water content? - ANSWER-Adaptations to survive
in either marine or freshwater: animal ideal to be isotonic- concentrations same inside &
outside (no cell wall in animals)
How do you find the proportion of offspring? - ANSWER-total seeds for cohort/total #
individuals in cohort
How many gametes are formed in asexual reproduction? - ANSWER-No gametes
formed
How many gametes are formed in sexual reproduction? - ANSWER-2 types of gametes
formed
How many types of gametes are formed in sexual reproduction? - ANSWER-2 types of
gametes forms- monoecious or hermaphroditic OR dioecious
How much of biomass of each trophic level is passed onto the next-higher level? -
ANSWER-From the base of plant productivity, 10%
Hypertonic, isotonic, and hypotonic - ANSWER-
Hypothesis of purifying selection: Meiosis - ANSWER-2n
Meiosis 1 + meiosis 2- only 1/2 of daughter cells have bad trait- competitive advantage
Hypothesis of purifying selection: Mitosis - ANSWER-All daughter cells are exact
genetic copies so all of them inherit the bad trait
In what 2 ways can eukaryotes reproduce? - ANSWER-1. Mitostis
2. Meiosis
In what 2 ways is flehmen unique to a species? - ANSWER-1. Compound structure
unique
2. Same compound, different proportions
Is self-fertilization possible in hermaphrodites? - ANSWER-Yes, often do
life table example - ANSWER-
Source and sink picture - ANSWER-Source - top
Sink- bottom
, survivorship curve example - ANSWER-
What 2 types are species (in general)? - ANSWER-1. r- selected species --> little
organisms
2. K-selected species --> bigger organisms
What 3 types of receptors can organisms respond to stimuli via? - ANSWER-1.
Mechanoreceptors
2. Chemoreceptors
3. Photoreceptors
What adaptation do unicellular species have to do to survive in fresh water? -
ANSWER-Regulation of water content
What adaptations have evolved to increase the probability of fertilization in external
fertilizing animals? - ANSWER-- Use some signal/cue to synchronize release
* environmental cue (photoperiod, warmer water T)
* cue from a non-specific (chemical, visual, etc.)
- Make lots of gametes to increase probability they'll meet (many preyed upon)
What are 2 structures for mating in white tail deer? - ANSWER-1. Antlers
2. Glands
What are 4 types of photosynthesizers? - ANSWER-1. cyanobacteria
2. single- celled algae
3. seaweed
4. land plants
What are all cells NOT to their environment? - ANSWER-Isotonic
What are all prokaryotic cells? - ANSWER-Haploid
What are alleles? - ANSWER-Different "versions" of the same gene- from 2 different
parents
What are bryophytes? - ANSWER-Plants without vascular tissue (xylem, phloem) such
as moss, aka non-vascular plants
What are cells connected by? - ANSWER-Cells connected by pores, ALL cells exposed
to soil & nutrients, H2O
What are characteristics of tropical plants? - ANSWER-Thin, waxy cuticle
- Large leaves w/ high SA
- "Drip tips" roll off excess H2O
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