Question 1

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

Accepted Answer

The cell labeled as B gives rise to the embryo plant after fertilization. Specifically, the fertilization of the egg cell contained in the embryo sac by a sperm cell leads to the development of a zygote, which divides repeatedly to form an embryo plant. The other cells in the embryo sac, including A, C, D, and E, are involved in supporting the development of the embryo and/or the female reproductive structures of the plant.

Question 2

Which of the following is a successful example of the commercial use of transgenic crops?

Accepted Answer

Inserting Bt toxin genes into cotton, maize, and potato has been a successful example of commercial use of transgenic crops as it has led to a reduction in the use of chemical insecticides and improved yields for farmers. Bt toxin genes produce a protein that is toxic to pests like bollworms, corn borers, and potato beetles, leading to improved crop yield and reduced damage from pests.

Question 3

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 in plants often involves the production of ribonucleases (RNAases) in the stigma cells, which break down RNA molecules in incompatible pollen grains and prevent their growth and fertilization. Therefore, looking for RNAase activity in the stigma cells is a common method to characterize self-incompatibility mechanisms.

Question 4

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

Accepted Answer

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

Question 5

A seed develops from

Accepted Answer

A seed develops from an ovule, which is a structure within the ovary of a flowering plant. After fertilization occurs, the ovule develops into a seed, which contains an embryo, food reserves, and a protective seed coat.

Question 6

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

Accepted Answer

Cell C is the central cell, which undergoes fusion with two sperm cells to form the triploid endosperm.

Question 7

Use the following information to answer the questions below.
Millions of people suffer from hunger and malnutrition.With artificial selection,farmers have improved the yields of many agricultural crops.More recently,plant biotechnology/genetic engineering has been suggested as a means to further improve crops and combat hunger.
-Golden rice is one example of a transgenic crop that produces beta carotene,a precursor for vitamin A.Golden rice has the potential to decrease blindness in populations that are suffering from vitamin A deficiency.What are some possible alternatives for people to consume adequate amounts of vitamin A?

Accepted Answer

It is important to provide people with a variety of options to consume vitamin A. Encouraging the consumption of unpolished rice can prevent loss of nutrients during processing. Providing leafy greens and local fruits that are naturally high in vitamin A can also be a sustainable solution as they do not require genetic modification. Therefore, options B and C are the best choices, and they can be combined to offer a diverse source of vitamin A.

Question 8

A fruit is

Accepted Answer

A fruit is defined as a mature ovary that contains seeds. The ovary develops into a fruit after fertilization occurs.

Question 9

All of the following strategies are being pursued with the goal of preventing transgene escape from genetically modified crops except

Accepted Answer

The other options (A, B, C, D) are all strategies that have been pursued to prevent transgene escape from GM crops, while hybridization with related wild weeds would increase the risk of transgene escape.

Question 10

The following questions refer to the diagram of an embryo sac of an angiosperm shown below.
 
-The ________ produces the pollen tube in the above figure.

Accepted Answer

The tube cell is the cell that produces the pollen tube in the embryo sac, which allows the sperm cells to travel to the egg cells for fertilization. The anther produces the pollen grains, the microspore develops into the pollen grain, the generative cell divides to form two sperm cells within the pollen grain, and the filament supports the anther.

Question 11

The pollen tube (see the above figure)grows in the ________ and is directed towards the micropyle by chemical attractants of the ________.

Accepted Answer

The pollen tube grows in the style and is directed towards the micropyle by the chemical attractants of the synergids.

Question 12

A transgenic plant is one that

Accepted Answer

A transgenic plant is one that has had genes from another species inserted into its genome. This is typically done through genetic engineering techniques. These genes can provide the plant with new traits, such as resistance to certain pests or tolerance to certain herbicides.

Question 13

Which of the following is a scientific concern related to creating genetically modified crops?

Accepted Answer

The concern of herbicide resistance spreading to weedy species is a well-known scientific concern related to creating genetically modified crops. This can lead to the growth of herbicide-resistant "superweeds" that can cause significant problems for farmers and the environment.

Question 14

Over human history,which process has been most important in improving the features of plants that have long been used by humans as staple foods?

Accepted Answer

Artificial selection, also known as selective breeding, is the process by which humans intentionally breed plants with desirable traits to create new varieties or improve existing ones. This process has been used for thousands of years to improve the features of plants that have long been used by humans as staple foods, such as grains, fruits, and vegetables. Genetic engineering, while a newer technology, has also been used to improve crops, but the most significant improvements have been made through selective breeding over time. Sexual selection and pesticide/herbicide application are not related to the improvement of plant features for human consumption.

Question 15

Regardless of where in the world a vineyard is located,in order for the winery to produce a Burgundy,it must use varietal grapes that originated in Burgundy,France.The most effective way for a new California grower to plant a vineyard to produce Burgundy is to

Accepted Answer

Grafting varietal Burgundy grape scions onto native (Californian) root stocks is the most effective way to produce Burgundy grapes in California. This method ensures that the grapevines will produce the same varietal Burgundy grapes as those originating in France, while also ensuring that the vines will be well adapted to the local environment and soil conditions.

Question 16

Which of the following is proving to be the most difficult task for plant breeders regardless of the techniques they use for crop improvement due to the complexity of the metabolic pathways involved?

Accepted Answer

The answer of Which of the following is proving to...

Question 17

Which of the following would be the most problematic for the natural environment in the development of genetically engineered crops?

Accepted Answer

The answer of Which of the following would be the...

Question 18

Use the following information to answer the questions below.
Millions of people suffer from hunger and malnutrition.With artificial selection,farmers have improved the yields of many agricultural crops.More recently,plant biotechnology/genetic engineering has been suggested as a means to further improve crops and combat hunger.
-Plant biotechnology,like all technologies,has benefits and risks.Thinking back on what you know about evolution and ecology,you know there are several serious environmental concerns with respect to transgenic crops.Which of the following is not an environmental concern of transgenic crops?

Accepted Answer

Option A is not an environmental concern of transgenic crops. The other options all describe potential risks of using genetically modified crops.

Question 19

The following questions refer to the diagram of an embryo sac of an angiosperm shown below.
 
-What is the function of the triploid endosperm?

Accepted Answer

The triploid endosperm is the food-storing tissue of the seed, providing nourishment for the developing embryo.

Question 20

Which of the following is a scientific concern related to creating genetically modified crops?

Accepted Answer

Herbicide resistance is often engineered into genetically modified crops, but there is a risk that this resistance could spread to weedy species, creating superweeds that are difficult to control. This could have negative impacts on agriculture and natural ecosystems.

Quiz 38: Angiosperm Reproduction and Biotechnology

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

Which of the following is a successful example of the commercial use of transgenic crops?

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

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

A seed develops from

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

A fruit is

All of the following strategies are being pursued with the goal of preventing transgene escape from genetically modified crops except

The following questions refer to the diagram of an embryo sac of an angiosperm shown below. -The ________ produces the pollen tube in the above figure.

The pollen tube (see the above figure) grows in the and is directed towards the micropyle by chemical attractants of the .

A transgenic plant is one that

Which of the following is a scientific concern related to creating genetically modified crops?

Over human history,which process has been most important in improving the features of plants that have long been used by humans as staple foods?

Regardless of where in the world a vineyard is located,in order for the winery to produce a Burgundy,it must use varietal grapes that originated in Burgundy,France.The most effective way for a new California grower to plant a vineyard to produce Burgundy is to

Which of the following is proving to be the most difficult task for plant breeders regardless of the techniques they use for crop improvement due to the complexity of the metabolic pathways involved?

Which of the following would be the most problematic for the natural environment in the development of genetically engineered crops?

The following questions refer to the diagram of an embryo sac of an angiosperm shown below. -What is the function of the triploid endosperm?

Which of the following is a scientific concern related to creating genetically modified crops?

Quiz 38: Angiosperm Reproduction and Biotechnology

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

Which of the following is a successful example of the commercial use of transgenic crops?

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

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

A seed develops from

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

A fruit is

All of the following strategies are being pursued with the goal of preventing transgene escape from genetically modified crops except

The following questions refer to the diagram of an embryo sac of an angiosperm shown below. -The ________ produces the pollen tube in the above figure.

The pollen tube (see the above figure) grows in the ________ and is directed towards the micropyle by chemical attractants of the ________.

A transgenic plant is one that

Which of the following is a scientific concern related to creating genetically modified crops?

Over human history,which process has been most important in improving the features of plants that have long been used by humans as staple foods?

Regardless of where in the world a vineyard is located,in order for the winery to produce a Burgundy,it must use varietal grapes that originated in Burgundy,France.The most effective way for a new California grower to plant a vineyard to produce Burgundy is to

Which of the following is proving to be the most difficult task for plant breeders regardless of the techniques they use for crop improvement due to the complexity of the metabolic pathways involved?

Which of the following would be the most problematic for the natural environment in the development of genetically engineered crops?

The following questions refer to the diagram of an embryo sac of an angiosperm shown below. -What is the function of the triploid endosperm?

Which of the following is a scientific concern related to creating genetically modified crops?

The pollen tube (see the above figure) grows in the and is directed towards the micropyle by chemical attractants of the .