BO101 Botany questions with verified answers
"Golden rice" is a transgenic variety that:
a) is resistant to various herbicides and thus rice fields can be weeded
with those herbicides.
b) includes bacterial genes that produce a toxin that reduces damage
from insect pests.
c) produces much larger, golden grains that increase crop yields
d) contains genes from other plants that increase vitamin A content of
the rice.
d Ans✓✓✓
34. Bryophytes have all of the following characteristics except
a) multicellularity
b) lignified vascular tissue
c) specialised cells and tissues
d) a reduced, dependent sporophyte Ans✓✓✓b
A heterosporous plant is one that:
a) produces a gametophyte that bears both antheridia and archegonia.
b) produces microspores and megaspores, which give rise to male and
female gametophytes.
c) produces spores all year long instead of during just one season.
d) reproduces only sexually. Ans✓✓✓b
,A major change that occurred during the evolution of plants from their
algal
ancestors was the origin of a branched sporophyte. What advantage
would
branched sporophytes provide in this stage of the life cycle?
a) increased gamete production
b) increased spore production
c) increased potential for independence of the diploid stage from the
haploid stage
d) increased fertilization rate Ans✓✓✓b
A plant breeder is attempting to introgress a disease resistance gene into
a crop variety. Which of the following statements is not true?
a) Crop breeding requires several generations to perform.
b) The offspring of a cross between a crop and a wild relative is called
an 'elite variety'.
c) The process can often be performed more quickly by genetic
modification.
d) Resistance genes are commonly found in landraces. Ans✓✓✓
A scientist extracts photosynthetic pigments from spinach and separates
them by paper chromatography using a methanol: chloroform: water
mixture in
,a 12: 5: 3 ratio. What is she most likely to observe?
a) Nothing will happen when using this mixture of solvents.
b) The chlorophyll will form a single spot on the chromatography paper.
c) The chlorophyll will form two spots with the accessory pigments
visible
underneath them.
d) The chlorophyll will form two spots with the accessory pigments
visible
above them. Ans✓✓✓d
Algae adjust to their light environment...
a) by producing more sugars.
b) by changing their pigment composition.
c) by changing their shape.
d) by producing more proteins. Ans✓✓✓
All algae that do not belong to the cyanobacteria are:
a) unicellular
b) eukaryotic
c) monophyletic.
d) evolved from land plants. Ans✓✓✓b
All of the following are common to both charophytes and land plants
except:
, a) sporopollenin.
b) lignin.
c) cellulose
d) chlorophyll a Ans✓✓✓b
Among crop plants, nitrogen-fixing root nodules are most commonly an
attribute of:
a) corn
b) legumes
c) wheat
d) members of the potato family Ans✓✓✓b
Arrange the following in the correct sequence, from earliest to most
recent, in which these plant traits originated.
1. sporophyte dominance, gametophyte independence
2. sporophyte dominance, gametophyte dependence
3. gametophyte dominance, sporophyte dependence
a) 1 → 2 → 3
b) 2 → 3 → 1
c) 2 → 1 → 3
d) 3 → 1 → 2 Ans✓✓✓d
Artemisinin is used as a treatment for
"Golden rice" is a transgenic variety that:
a) is resistant to various herbicides and thus rice fields can be weeded
with those herbicides.
b) includes bacterial genes that produce a toxin that reduces damage
from insect pests.
c) produces much larger, golden grains that increase crop yields
d) contains genes from other plants that increase vitamin A content of
the rice.
d Ans✓✓✓
34. Bryophytes have all of the following characteristics except
a) multicellularity
b) lignified vascular tissue
c) specialised cells and tissues
d) a reduced, dependent sporophyte Ans✓✓✓b
A heterosporous plant is one that:
a) produces a gametophyte that bears both antheridia and archegonia.
b) produces microspores and megaspores, which give rise to male and
female gametophytes.
c) produces spores all year long instead of during just one season.
d) reproduces only sexually. Ans✓✓✓b
,A major change that occurred during the evolution of plants from their
algal
ancestors was the origin of a branched sporophyte. What advantage
would
branched sporophytes provide in this stage of the life cycle?
a) increased gamete production
b) increased spore production
c) increased potential for independence of the diploid stage from the
haploid stage
d) increased fertilization rate Ans✓✓✓b
A plant breeder is attempting to introgress a disease resistance gene into
a crop variety. Which of the following statements is not true?
a) Crop breeding requires several generations to perform.
b) The offspring of a cross between a crop and a wild relative is called
an 'elite variety'.
c) The process can often be performed more quickly by genetic
modification.
d) Resistance genes are commonly found in landraces. Ans✓✓✓
A scientist extracts photosynthetic pigments from spinach and separates
them by paper chromatography using a methanol: chloroform: water
mixture in
,a 12: 5: 3 ratio. What is she most likely to observe?
a) Nothing will happen when using this mixture of solvents.
b) The chlorophyll will form a single spot on the chromatography paper.
c) The chlorophyll will form two spots with the accessory pigments
visible
underneath them.
d) The chlorophyll will form two spots with the accessory pigments
visible
above them. Ans✓✓✓d
Algae adjust to their light environment...
a) by producing more sugars.
b) by changing their pigment composition.
c) by changing their shape.
d) by producing more proteins. Ans✓✓✓
All algae that do not belong to the cyanobacteria are:
a) unicellular
b) eukaryotic
c) monophyletic.
d) evolved from land plants. Ans✓✓✓b
All of the following are common to both charophytes and land plants
except:
, a) sporopollenin.
b) lignin.
c) cellulose
d) chlorophyll a Ans✓✓✓b
Among crop plants, nitrogen-fixing root nodules are most commonly an
attribute of:
a) corn
b) legumes
c) wheat
d) members of the potato family Ans✓✓✓b
Arrange the following in the correct sequence, from earliest to most
recent, in which these plant traits originated.
1. sporophyte dominance, gametophyte independence
2. sporophyte dominance, gametophyte dependence
3. gametophyte dominance, sporophyte dependence
a) 1 → 2 → 3
b) 2 → 3 → 1
c) 2 → 1 → 3
d) 3 → 1 → 2 Ans✓✓✓d
Artemisinin is used as a treatment for
