BIOL 325: CONCEPTS & QUESTIONS AND CORRECT
ANSWERS WITH COMPLETE SOLUTIONS | NEW
VERSION 2026
What are the 3 domains of life? - ANSWERS Bacteria, Archaea, Eukarya
Who is the common ancestor for plants and animals? - ANSWERS Unicellular
green algae; 400-500 million years ago they transitioned from water to land and
gave rise to plants (with rise of chloroplasts)
Ancestral lineage: first ancestor, secondary events, apomorphies, how we got the
different kingdoms - ANSWERS 3.5 billion years ago we saw the first ancestor,
started living in protoplasm and divided to give us the different kingdoms; 2nd
endosymbiotic event: eukaryote that could photosynthesize was taken up by
another eukaryote (created chloroplasts); second primary event: chloroplast
engulfed by eukaryotic cell
Who were land plants derived from? - ANSWERS Charophytes; cutie stopped
evaporating, separate reproductive organs, stomates control moisture,
transpiration & transportation (above stomates)
What three attributes do all green plants share? - ANSWERS starch,
chlorophyll, flagella
What are the main characteristics of Angiosperms? - ANSWERS 1. flower parts
2. fruits
, 3. pollen (fertilization)
4. Leaves
What phylum do flowering plants belong to? - ANSWERS Tracheophyta
Explain the pathway of pollen in reproduction - ANSWERS Pollen comes from
the anther sacs and lands on the stigma, the pollen travels down the style and into
the hollow ovary, the pollen fertilizes the ovules in the ovary, it then develops into
seeds and the ovary wall turns into the fruit (flesh of the fruit)
What type of plants species do NOT need a partner to reproduce? - ANSWERS
Monoecious species
What type of plant species need a partner to reproduce? - ANSWERS
Dioecious species
Give an example of a monoecious plant. - ANSWERS Corn: has tassels
(male/staminate) and silks (female/pistillate); pollen from the tassels land on the
stigma at the end of the silks; when fertilized the ovule will turn into a kernel of
corn
What is the difference between a carpel and a pistil? - ANSWERS When
referring to an unfused carpel you can use carpel and pistil interchangeably (called
either a pistil, simple pistil, or carpel), although when more than one carpel fuse
together it would be called a compound pistil.
ANSWERS WITH COMPLETE SOLUTIONS | NEW
VERSION 2026
What are the 3 domains of life? - ANSWERS Bacteria, Archaea, Eukarya
Who is the common ancestor for plants and animals? - ANSWERS Unicellular
green algae; 400-500 million years ago they transitioned from water to land and
gave rise to plants (with rise of chloroplasts)
Ancestral lineage: first ancestor, secondary events, apomorphies, how we got the
different kingdoms - ANSWERS 3.5 billion years ago we saw the first ancestor,
started living in protoplasm and divided to give us the different kingdoms; 2nd
endosymbiotic event: eukaryote that could photosynthesize was taken up by
another eukaryote (created chloroplasts); second primary event: chloroplast
engulfed by eukaryotic cell
Who were land plants derived from? - ANSWERS Charophytes; cutie stopped
evaporating, separate reproductive organs, stomates control moisture,
transpiration & transportation (above stomates)
What three attributes do all green plants share? - ANSWERS starch,
chlorophyll, flagella
What are the main characteristics of Angiosperms? - ANSWERS 1. flower parts
2. fruits
, 3. pollen (fertilization)
4. Leaves
What phylum do flowering plants belong to? - ANSWERS Tracheophyta
Explain the pathway of pollen in reproduction - ANSWERS Pollen comes from
the anther sacs and lands on the stigma, the pollen travels down the style and into
the hollow ovary, the pollen fertilizes the ovules in the ovary, it then develops into
seeds and the ovary wall turns into the fruit (flesh of the fruit)
What type of plants species do NOT need a partner to reproduce? - ANSWERS
Monoecious species
What type of plant species need a partner to reproduce? - ANSWERS
Dioecious species
Give an example of a monoecious plant. - ANSWERS Corn: has tassels
(male/staminate) and silks (female/pistillate); pollen from the tassels land on the
stigma at the end of the silks; when fertilized the ovule will turn into a kernel of
corn
What is the difference between a carpel and a pistil? - ANSWERS When
referring to an unfused carpel you can use carpel and pistil interchangeably (called
either a pistil, simple pistil, or carpel), although when more than one carpel fuse
together it would be called a compound pistil.
