Question 1

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1.
  Figure 30.1
-Based on Figure 30.1,which cell(s)become(s)the triploid endosperm?

Accepted Answer

The cell labeled as C becomes the triploid endosperm, which develops from the fusion of one sperm nucleus with the central cell's two polar nuclei.

Question 2

Which of the following types of plants are incapable of self-pollination?

Accepted Answer

Dioecious plants have separate male and female plants, so they require pollination from another plant in order to produce viable seeds. They cannot self-pollinate because they don't possess both male and female reproductive organs on the same plant.

Question 3

Plant biotechnology is an effective tool for

Accepted Answer

Plant biotechnology can be used to produce crops that are more resistant to pests and diseases, have higher yields, and are more nutritious. This can help increase food security and reduce world hunger. It is not related to increasing oil imports, decreasing genetic diversity, or increasing incompatibility of fertilization.

Question 4

Transgenic plants (plants modified by biotechnology tools)are

Accepted Answer

The answer of Transgenic plants (plants modified by biotechnology tools)are
...

Question 5

Biofuels are mainly produced by

Accepted Answer

Biofuels are mainly produced through the breakdown of cell wall biopolymers (such as cellulose and hemicellulose) into sugars that can be fermented to produce fuels such as ethanol. This process is known as bioconversion, and it can be carried out by microorganisms such as yeast and bacteria. Plants can also be used as a source of biofuels, through the extraction of oils from their seeds or the conversion of their starches into ethanol. However, the conversion of hemicellulose into gasoline (choice B), the genetic engineering of ethanol-generating genes into plants (choice C), and the use of transgenic crops containing ethylene (choice D) are not currently major methods for biofuel production.

Question 6

You are studying a plant from the Amazon rain forest that shows strong self-incompatibility.To characterize this reproductive mechanism,you would look for

Accepted Answer

Self-incompatibility is a mechanism that ensures that plants cannot self-fertilize. It involves the recognition and rejection of self-pollen by the stigma. Ribonuclease (RNAase) enzymes play a critical role in this process by breaking down the RNA molecules in self-pollen, triggering a cascade of events that lead to its rejection. Therefore, to characterize this reproductive mechanism, one would look for RNAase activity in stigma cells.

Question 7

A parent with an S₁S₂ genotype exhibiting sporophytic self-incompatibility can potentially fertilize which of the following plant genotypes of the same species with pollen grains?

Accepted Answer

In sporophytic self-incompatibility, the pollen's ability to fertilize is determined by the genotype of the pollen-producing plant. Pollen from an S1S2 plant will be rejected by plants with either S1 or S2 alleles. Therefore, only the S3S4 plant can be fertilized by S1S2 pollen.

Question 8

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1.
  Figure 30.1
-Based on Figure 30.1,which cell(s)guide(s)the pollen tube to the egg cell?

Accepted Answer

The synergid cells (A) guide the pollen tube to the egg cell.

Question 9

Recent research has shown that fertilization requires that carpels recognize pollen grains as "self" or "non-self." For self-incompatibility,the system requires

Accepted Answer

Self-incompatibility is a system in plants where the carpel (female reproductive organ) rejects self-pollen, as they are recognized as non-self. This promotes outbreeding and genetic diversity. In this system, the rejection of self-cells is necessary for fertilization to occur.

Question 10

Which of the following can cause abnormal development of floral parts?

Accepted Answer

A mutation in a gene can disrupt the normal development of floral parts by altering the proteins or enzymes required for proper formation. Pollinators and meristems are important for reproductive success but are not directly involved in floral development abnormalities.

Question 11

Which of the following could be considered an evolutionary advantage of asexual reproduction in plants?

Accepted Answer

Asexual reproduction allows plants to produce genetically identical offspring, which can be advantageous in a stable environment where the traits of the parent plant are already well-suited to the conditions. This increases the success rate of the progeny because they will have the same advantageous traits as the parent.

Question 12

The introduction of genes using biotechnological techniques (genetic engineering)from the bacterium Bacillus thuringiensis in corn and cotton crops

Accepted Answer

The genes introduced from Bacillus thuringiensis into corn and cotton crops produce proteins that are toxic to certain types of insects, reducing the need for chemical insecticides. This has both economic and environmental benefits as it decreases the cost of insecticide use and reduces the environmental harm caused by these chemicals.

Question 13

Here is the ABC hypothesis of the impact of genes A,B,and C on floral part development:
i."A" genes are switched on in the two outer whorls (sepals and petals).
ii."B" genes are switched on in the two middle whorls (petals and stamens).
iii."C" genes are switched on in the inner two whorls (stamens and carpels).
Which of these genes are active for petals?

Accepted Answer

Gene A is active in sepals and petals, while gene B is active in petals and stamens. Therefore, option B – genes i and ii – are active for petals.

Question 14

Due to the limitation of land and water resources on planet earth,biotechnology can help to increase the crop yields to meet human needs and demands in the years to come.Farmers have to produce ________% more grain per hectare to feed human population in ________.

Accepted Answer

Farmers have to produce 40% more grain per hectare to feed human population in 2030.

Question 15

Cassava is a ________ crop that has been modified by biotechnology experiments.

Accepted Answer

Cassava is a root crop that has been modified by biotechnology experiments, specifically using genetic engineering techniques to introduce virus resistance and improve its nutrient content.

Question 16

The most abundant organic compounds on planet Earth that are essential and a great resource to produce biofuels are

Accepted Answer

Cellulose is the most abundant organic compound on Earth as it makes up the cell wall of plants. It is a great resource to produce biofuels as it can be converted into sugars that can be fermented into ethanol or other fuels. Lignin is also abundant in plant cell walls but is more difficult to break down and is not as commonly used in biofuel production. Protein and lipid are also important organic compounds but not as abundant in the environment as cellulose.

Question 17

Which of the following is a true statement about clonal reproduction in plants?

Accepted Answer

Making cuttings of ornamental plants is a common form of asexual reproduction in which a piece of the parent plant is cut off and then rooted to produce a new and genetically identical plant. This is a form of fragmentation, as the cutting fragments from the original plant. Options A and B are both false as clones of plants can occur naturally, and cloning has been demonstrated in plants. Option D is partially true, as cloning in plants is a form of asexual reproduction, but it is not sexual reproduction.

Question 18

Which of the following is true about vegetative reproduction?

Accepted Answer

Vegetative reproduction involves the production of clones of the parent plant, meaning that offspring are genetically identical to the parent. This is achieved through mitosis, rather than meiosis, which produces haploid and diploid cells. While vegetative reproduction can result in the production of vegetables, it can also produce fruits if the parent plant is a fruit-bearing species.

Question 19

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1.
  Figure 30.1
-Based on Figure 30.1,which cell(s),after fertilization,give(s)rise to the embryo plant?

Accepted Answer

The answer of The following questions refer to the diagram...

Question 20

A plant has a set of multiple alleles for "self" gene "S," which causes self-incompatibility (the ability of plant to reject its own pollen or pollen from closely related plants)to fertilize the egg.Here is a set of plants (sporophytes)with genotypes: i.S₁S₂ ii.S₂S₃ iii.S₃S₃ iv.S₁S₃ The S₃ pollen from S₂S₃ parental sporophyte cannot fertilize the eggs of

Accepted Answer

The answer of A plant has a set of multiple...

Quiz 30: Reproduction and Domestication of Flowering Plants

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1. Figure 30.1 -Based on Figure 30.1,which cell(s) become(s) the triploid endosperm?

Which of the following types of plants are incapable of self-pollination?

Plant biotechnology is an effective tool for

Transgenic plants (plants modified by biotechnology tools) are

Biofuels are mainly produced by

You are studying a plant from the Amazon rain forest that shows strong self-incompatibility.To characterize this reproductive mechanism,you would look for

A parent with an S₁S₂ genotype exhibiting sporophytic self-incompatibility can potentially fertilize which of the following plant genotypes of the same species with pollen grains?

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1. Figure 30.1 -Based on Figure 30.1,which cell(s) guide(s) the pollen tube to the egg cell?

Recent research has shown that fertilization requires that carpels recognize pollen grains as "self" or "non-self." For self-incompatibility,the system requires

Which of the following can cause abnormal development of floral parts?

Which of the following could be considered an evolutionary advantage of asexual reproduction in plants?

The introduction of genes using biotechnological techniques (genetic engineering) from the bacterium Bacillus thuringiensis in corn and cotton crops

Due to the limitation of land and water resources on planet earth,biotechnology can help to increase the crop yields to meet human needs and demands in the years to come.Farmers have to produce % more grain per hectare to feed human population in .

Cassava is a ________ crop that has been modified by biotechnology experiments.

The most abundant organic compounds on planet Earth that are essential and a great resource to produce biofuels are

Which of the following is a true statement about clonal reproduction in plants?

Which of the following is true about vegetative reproduction?

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1. Figure 30.1 -Based on Figure 30.1,which cell(s) ,after fertilization,give(s) rise to the embryo plant?

Quiz 30: Reproduction and Domestication of Flowering Plants

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1. Figure 30.1 -Based on Figure 30.1,which cell(s) become(s) the triploid endosperm?

Which of the following types of plants are incapable of self-pollination?

Plant biotechnology is an effective tool for

Transgenic plants (plants modified by biotechnology tools) are

Biofuels are mainly produced by

You are studying a plant from the Amazon rain forest that shows strong self-incompatibility.To characterize this reproductive mechanism,you would look for

A parent with an S1S2 genotype exhibiting sporophytic self-incompatibility can potentially fertilize which of the following plant genotypes of the same species with pollen grains?

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1. Figure 30.1 -Based on Figure 30.1,which cell(s) guide(s) the pollen tube to the egg cell?

Recent research has shown that fertilization requires that carpels recognize pollen grains as "self" or "non-self." For self-incompatibility,the system requires

Which of the following can cause abnormal development of floral parts?

Which of the following could be considered an evolutionary advantage of asexual reproduction in plants?

The introduction of genes using biotechnological techniques (genetic engineering) from the bacterium Bacillus thuringiensis in corn and cotton crops

Due to the limitation of land and water resources on planet earth,biotechnology can help to increase the crop yields to meet human needs and demands in the years to come.Farmers have to produce ________% more grain per hectare to feed human population in ________.

Cassava is a ________ crop that has been modified by biotechnology experiments.

The most abundant organic compounds on planet Earth that are essential and a great resource to produce biofuels are

Which of the following is a true statement about clonal reproduction in plants?

Which of the following is true about vegetative reproduction?

The following questions refer to the diagram of an embryo sac of an angiosperm shown in Figure 30.1. Figure 30.1 -Based on Figure 30.1,which cell(s) ,after fertilization,give(s) rise to the embryo plant?

A parent with an S₁S₂ genotype exhibiting sporophytic self-incompatibility can potentially fertilize which of the following plant genotypes of the same species with pollen grains?

Due to the limitation of land and water resources on planet earth,biotechnology can help to increase the crop yields to meet human needs and demands in the years to come.Farmers have to produce % more grain per hectare to feed human population in .