The appropriate answer is a. to help scientists understand medical issues that cannot be tested on humans. Scientists often use animals that are easy to cultivate and have some similar anatomical feature to humans or have a feature similar to human organs or features. One of the most common model organism is the mice; a specially bred species used for testing in the lab.
Answer:
The correct answer is option c. "cell interactions".
Explanation:
Cell-to-cell interactions, or only cells interactions, refers to the mechanisms that cells have to communicate among them. These mechanisms takes place at the surface of the cells by sending and receiving signals in receptors, which later initiate transduction pathways. Cell interactions play a crucial role in the development of embryos, therefore if a knockout mouse has embryonic lethality due to a disruption in a receptor, it is very likely that the development process that is affected is related with cell interactions.
Answer:
a. Detecing a specific mutation allows for pheonotypic abnormalities to be identified faster
Explanation:
When a human being has a complex condition, this may be due to a genetic disorder, for example, deleterious mutations in their DNA.
In order to identify if a pathology or condition is related to genetic factors and, specifically in order to detect the gene or genomic regions involved in that condition, genome comparison is a very useful and valuable tool.
When two genomes are compared, differences between them can be detected. The comparison of the genome of a person with no condition with the genome of a human with a complex condition allows to recognize mutations (factors) in the person with the complex condition that may be involved in such condition.
Answer:
a- 3
b- 2
c- 4
d- 6
e- 5
Explanation:
A) Euglenozoans are eukaryotic organisms that belong to the Kingdom Protista. They are either free-living or parasitic in nature. They have no cell wall in their structure but instead possess a pellicle.
B) Diatoms are photosynthetic algae that belong to the division-Bacillariophyta. The ability to photosynthesize makes them a primary producer in an ecosystem. Their cell wall is made up of silica, which is unique to their group of algae. They also produce oils to maintain buoyancy.
C) Brown algae belong to the division- Phaeophyta. They exhibit alternation of generations in their life cycle where they produce both motile zoospores and sperm.
D) Apicomplexans are organisms such as plasmodium etc that belong to the phylum- Apicomplexa. Most of them are pathogenic, with some affecting humans. They lack cell wall but have a flat vesicle called ALVEOLI.
E) Green algae belong to the division Chlorophyta. They are photosynthetic organisms and exists as unicellular or colonial organisms. They have flagellated for locomotion.
