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The F2 generation phenotypes for each cross are shown in Table 1. (See attachment) Which of the following is the mean number per cross of F2 generation offspring that are the result of crossing over?
Answer:
B, 2.2
Explanation:
The parental genotypes are long and black vs short and white. Therefore the phenotypes that result from crossing over are long and white, and short and black. (middle two rows of the table). If we add up the total number of offspring with these genotypes we get 6 long whites, and 5 short blacks.
The total is 11 from 5 crosses, so the mean is 11/5 = 2.2
Answer:
C) Radioactivity levels would increase first at the rough endoplasmic reticulum, followed by the Golgi, and then the secretory vesicles.
Explanation:
Radioactivity levels would increase first at the rough endoplasmic reticulum, followed by the Golgi, and then the secretory vesicles. Ribosomes attached on the rough ER will manufacture the proteins. The radioactivity will be seen here first. The ER transports the proteins to the Golgi for packaging, sorting, and modification. This is where the radioactivity will be seen next. The Golgi sorts and packages proteins into secretory vesicles, which will travel to the membrane for export. This is where the radioactivity will be seen last.
Freezing-up" or being unable to move or respond physically during a traumatic event is an example of <u>B. trauma induced paralysis</u>.
<u>Explanation</u>:
Paralysis is the loss of the ability to move as a result of illness, poison, or injury. Paralysis is caused by damage in the nervous system or spinal cord. Stroke and trauma with nerve injury are major cause of the paralysis.
The person facing traumatic event may be affected physically, emotionally and psychologically. Sexual or physical abuse also comes under traumatic event. Multiple traumas can impact the body and mind of a person.
Answer:
B. Microbes may produce unique proteins useful in genetic research
Explanation:
Biodiversity refers to the diversity of living beings present on Earth. The biodiversity is a very important component of the ecosystem as these living organisms are interlinked with each other. Therefore, the loss of biodiversity will affect the ecosystem.
When we look at the biodiversity a layman considers the living organisms which can be seen with eyes but the diversity also exists at the level of the micro-organisms.
The man-made activities are not only harming the macroscopic but also microscopic organisms. The microbes play an important role in our life like these days they are used by the scientific community to study the genetic and related fields like molecular biology. The microbes produce proteins that are consumed by humans.
Thus, Option-B is correct.
<h3><u>Answer;</u></h3>
A) Some protists evolved into other eukaryotic groups.
<h3><u>Explanation</u>;</h3>
- Protists are eukaryotes , making them much more complex than the prokaryotes, such as bacteria.
- Protists may be classified as a paraphyletic group, since they are difficult to group under a single ancestor because of their diversity and dissimilarity from each other.
- Protists evolved from prokaryotes, eventually giving rise to the entire line of eukaryotes that exists today.
