The lamina propria, found in various organs in the body, is composed of loose connective tissue. It serves as a supportive framework and is crucial for immune response.
The lamina propria is a component of the mucosa layer in various organs in the body, including the digestive and respiratory tracts. Regarding its composition, the lamina propria is composed of loose connective tissue. This type of tissue is characterized by its loose, flexible structure, which allows it to provide support and nourishment to surrounding structures. The lamina propria, therefore, serves as a supportive framework and plays a key role in immune response within the mucosa.
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Answer:
The process of sharing results and working together to develop new hypotheses and experiments is known as collaboration.
Explanation:
B) In any population, variation exists. Some bacteria are resistant to antibiotics. Most bacteria die, but the bacteria that are resistant survive and reproduce.
C) In a population of bacteria that are exposed to antibiotics, some bacteria change their genetic make-up and survive. The new genetic make-up is passed on to offspring.
D) There is a change in the environment: an antibiotic is added. Some of the bacteria are capable of changing to the new environment. They survive and reproduce, passing along their favorable traits.
Answer:
The most appropriate answer would be D) There is a change in the environment: an antibiotic is added. Some of the bacteria are capable of changing to the new environment. They survive and reproduce, passing along their favorable traits.
Natural selection refers to the process by which organisms who are better adapted to the change in the environment have better chances for survival and reproduction.
The steps for natural selection can be explained as:
I. Inherited variation: Within a population, organisms often exhibit variations which can be inherited such as color, size, et cetera.
II. Competition: This is the phase in which organisms struggle to survive. During this, species usually produce more offspring as compared to the carrying capacity of the environment.
In the given situation, environment change is the addition of antibiotic.
III. Selection: It is the phase of differential reproduction that is, organisms who are best adapted to the environmental change have better chances to mature to reproductive age. They reproduce and pass the beneficial traits to the offspring.
Bacteria which are better adapted to the new environment survive, reproduce, and pass their beneficial traits to the next generation.
IV. Evolution: Changes in allele frequency in a population accumulate over time and leads to the evolution.
b. increases
c. remains the same
Answer: a. decreases
Explanation:
A population density can be define as the number of individuals in a population of a species living in a unit of area in a particular time. The population density can be influenced by number of births, deaths, immigration, emigration and competition. The number of live birth in a concerned population and immigration (introduction of the new members) are likely to increase the population density of a region. But the number of deaths and emigration (the members of the same population move to a new habitat), and the competition (the members of the same species may compete among themselves for the same resources, the superior one will receive the resources and the inferior one will loose and may die) will decrease the population density.
According to the given situation, death rate and competition among the individuals will likely to decrease the population density.
The cells that are always single-celled are prokaryotic cells and include bacteria and archaea. These cells do not have a nucleus and are much simpler than eukaryotic cells, which can form multicellular organisms. However, some eukaryotic organisms like yeast and protozoa, can also remain single-celled during their entire lifecycle.
The kinds of cells that are always single-celled are called prokaryotic cells and include bacteria and archaea. These cells do not have a nucleus and are much simpler than eukaryotic cells, which can form multicellular organisms. Each prokaryotic cell functions independently, and despite their simplicity, they are extraordinarily diverse and adaptable, capable of surviving in an array of environments from Arctic ice to volcanic vents.
It's also worth noting that some eukaryotic organisms like yeast and protozoa while being more complex and having nuclei, can remain as single-celled organisms for their entire lifecycle.
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Off shore rigs, also called oil platforms, extract oil from the earth. Off shore rigs are quite large structures, and if close to one, it probably wouldn't be too hard to see it. Off shore rigs explore, extract, store, and process petroleum (basically oil). An off shore rig extracts the oil from rocks below the seabed. It is very dangerous and difficult work to work at an oil rig, but salaries are often quite high, partially compensating for the risk.