Sherry draws a diagram to compare selective breeding and genetic engineering.
Which label belongs in the area marked Z?
requires modification of DNA
involves the production of offspring
can be done with plants
may result in potential risks
11 answers
The label that belongs in the area marked Z is "genetic engineering." Genetic engineering involves the modification of DNA and may result in potential risks. It can be done with plants as well as animals and other organisms.
Why is decreased genetic variation in a species considered a negative impact of genetic technologies?
It reduces the nutritional value of foods produced by these species.
It produces crops that are more resistant to weed killer.
It makes the species more susceptible to diseases.
It results in foods with less desirable traits.
It reduces the nutritional value of foods produced by these species.
It produces crops that are more resistant to weed killer.
It makes the species more susceptible to diseases.
It results in foods with less desirable traits.
Decreased genetic variation in a species is considered a negative impact of genetic technologies because it makes the species more susceptible to diseases. When there is less genetic variation, it means that all individuals in the species have similar genetic makeup. This lack of genetic diversity makes them more vulnerable to diseases because if one individual is susceptible to a particular disease, chances are that all individuals in the species would also be susceptible. Additionally, decreased genetic variation can also lead to a loss of desirable traits and increase the risk of inbreeding depression, which can further weaken the species' overall health and resilience.
A student wrote a sentence describing a difference between sexual reproduction and asexual reproduction.
Asexual reproduction requires two parents, and sexual reproduction requires one parent.
Which statement describes the student’s sentence?
It correctly describes the two processes.
It correctly describes asexual reproduction, but incorrectly describes sexual reproduction.
It incorrectly describes asexual reproduction, but correctly describes sexual reproduction.
It incorrectly describes the two processes.
Asexual reproduction requires two parents, and sexual reproduction requires one parent.
Which statement describes the student’s sentence?
It correctly describes the two processes.
It correctly describes asexual reproduction, but incorrectly describes sexual reproduction.
It incorrectly describes asexual reproduction, but correctly describes sexual reproduction.
It incorrectly describes the two processes.
The statement "Asexual reproduction requires two parents, and sexual reproduction requires one parent" incorrectly describes both asexual and sexual reproduction.
In asexual reproduction, only one parent is involved, and offspring are produced through the replication of the parent's cells or the formation of specialized reproductive structures. Examples of asexual reproduction include binary fission and budding.
In sexual reproduction, two parents are involved, each contributing genetic material to produce offspring through the fusion of gametes (sperm and egg). This process allows for genetic variation and the reshuffling of traits.
Therefore, the student's sentence incorrectly describes both processes.
In asexual reproduction, only one parent is involved, and offspring are produced through the replication of the parent's cells or the formation of specialized reproductive structures. Examples of asexual reproduction include binary fission and budding.
In sexual reproduction, two parents are involved, each contributing genetic material to produce offspring through the fusion of gametes (sperm and egg). This process allows for genetic variation and the reshuffling of traits.
Therefore, the student's sentence incorrectly describes both processes.
Which process involves mitosis and is used to produce new mushrooms or mold?
binary fission
sporulation
vegetative propagation
budding
binary fission
sporulation
vegetative propagation
budding
The process that involves mitosis and is used to produce new mushrooms or mold is sporulation. Sporulation is a form of asexual reproduction where specialized reproductive cells called spores are produced through mitosis. These spores can then germinate and grow into new individuals, such as mushrooms or molds.
Some illnesses and harmful infections are caused by bacteria. These bacteria grow in the human body and often make people sick with symptoms like coughing, sneezing, and fever. These illnesses are not related to any genetic mutations or other problems with DNA.
Why would gene therapy fail to cure illnesses caused by bacteria?
Gene therapy reduces symptoms but never cures illnesses.
Gene therapy does not work on most people.
Gene therapy only focuses on replacing mutated genes.
Gene therapy is too long a process.
Why would gene therapy fail to cure illnesses caused by bacteria?
Gene therapy reduces symptoms but never cures illnesses.
Gene therapy does not work on most people.
Gene therapy only focuses on replacing mutated genes.
Gene therapy is too long a process.
Gene therapy would fail to cure illnesses caused by bacteria because gene therapy focuses on replacing mutated genes, but these illnesses are not related to any genetic mutations or problems with DNA. Bacterial infections are caused by the presence and activity of bacteria within the body, and gene therapy primarily aims to correct genetic defects or mutations. It is not designed to directly target and eliminate bacteria. Therefore, gene therapy would not be an effective treatment for bacterial illnesses.
What happens during telophase II? Select three options.
Chromosomes condense.
Chromosomes line up along the middle.
Spindle fibers disappear.
Nuclear membranes form.
Cytoplasm starts to divide.
Chromosomes condense.
Chromosomes line up along the middle.
Spindle fibers disappear.
Nuclear membranes form.
Cytoplasm starts to divide.
During telophase II, three of the listed options occur:
1. Nuclear membranes form: Telophase II marks the end of meiosis II. At this stage, the nuclear membrane starts to form around the separated sets of chromosomes.
2. Cytoplasm starts to divide: In telophase II, cytokinesis or the division of cytoplasm begins. This eventually leads to the physical separation of the two daughter cells.
3. Chromosomes condense: In telophase II, the chromosomes become less condensed compared to earlier phases of meiosis. This decondensation allows for easier interaction between the genetic material during subsequent stages.
Chromosomes lining up along the middle and spindle fibers disappearing are characteristic of metaphase and anaphase, respectively, rather than telophase II.
1. Nuclear membranes form: Telophase II marks the end of meiosis II. At this stage, the nuclear membrane starts to form around the separated sets of chromosomes.
2. Cytoplasm starts to divide: In telophase II, cytokinesis or the division of cytoplasm begins. This eventually leads to the physical separation of the two daughter cells.
3. Chromosomes condense: In telophase II, the chromosomes become less condensed compared to earlier phases of meiosis. This decondensation allows for easier interaction between the genetic material during subsequent stages.
Chromosomes lining up along the middle and spindle fibers disappearing are characteristic of metaphase and anaphase, respectively, rather than telophase II.
1 answer