Answer:
An organism with high fitness has adaptations that are well suited to their environment allowing them survive and reproduce. An organism with low fitness has characteristics that are not well suited to their environment meaning they almost certainly die without reproducing.
Explanation:
Answer:
The correct answer is "There are several mechanisms that explain why a hormone have different effects in different cells. These mechanisms include: multiple receptors for the same hormone, a single receptor coupled to different pathways and hormones interacting with receptors for other molecules".
Explanation:
Hormones are among the most versatile molecules of the body, responsible for different biological processes such as human growth, sex development and metabolisms. Hormones are responsible of these complex biological processes because they have drastically different effects in different cells. There are several mechanisms that explain why a hormone have different effects in different cells. These mechanisms include:
- Multiple receptors for the same hormone. For instance, there are multiple receptor for dopamine, a hormone and neurotransmitter responsible for different functions such as movement, memory, sleep and motivation.
- A single receptor coupled to different pathways. Most hormone receptors act with a cascade of signaling. This in consequence results in a single receptor interacting with different molecules having multiple effects.
- Hormones interacting with receptors for other molecules. One example is the action of one metabolite of progesterone named allopregnanolone. This metabolite interacts with GABA-A receptor, which gives it anxiolitic properties.
Molecular cloning<span> is a set of experimental methods in </span>molecular biology that are used to assemble recombinant DNAmolecules and to direct their replication within host organisms.The use of the word cloning refers to the fact that the method involves the replication of one molecule to produce a population of cells with identical DNA molecules. Molecular cloning generally uses DNA sequences from two different organisms: the species that is the source of the DNA to be cloned, and the species that will serve as the living host<span> for replication of the recombinant DNA. Molecular cloning methods are central to many contemporary areas of modern biology and medicine.
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Answer: Amino acids.
Explanation:
There were an famous experiment made by two biochemists called Stanley Miller and Harold Urey, in the year of 1953. They made it at the University of Chicago, USA.
In this experiment, Stanley Miller and Harold Urey simulated hypothetical conditions that Earth’s early atmosphere had, in order to test the hypothesis that gases (as the methane, carbon dioxide, ammonia, amonia and water vapor) allowed inorganic chemicals to form organic molecules.
After one week, these scientis found that organic compounds were formed.
Through this experiment the scientists Stanley Miller and Harold Urey obtained that several amino acids were formed (the most abundant was Glycine).
According to their work, they got 13 of the 22 aminoacids that are used to make proteins in living cells.
A group of cells performing similar function is called a tissue
