Answer:
Answer No 1:
The earliest evidence for the occurrence of viruses was the discovery of an infectious agent in the sap of a tobacco plant. Experiments were set with different filters from which bacteria could pass but viruses being even smaller than bacteria could not pass.
Viruses were difficult to study because they are very small and couldn't be seen even under a microscope.
Answer No 2:
Wendell Stanley made his studies on the tobacco mosaic virus (TMV). Wendell Stanley developed techniques and crystallized this virus. At that time, it was known that even a very simple cell does not undergo crytallization. Hence, Wendell Stanley got to known that this structure is some infectious agent which has the ability of crystallization.
Answer No 3:
The four forms of viral genomes are:
- double-stranded DNA
- single-stranded DNA
- double-stranded RNA
- single-stranded RNA.
Answer No 4:
The capsid can be described as proteins which make up a shell to enclose the genome of a virus. Capsomeres can be described as the protein sub-units from which a capsid is made. The shapes of a capsid can be characterized into
- rod-shaped: helical viruses, or inside spherical viruses
.
- icosohedral: icosohedral viruses or the heads of bacteriophages.
Answer No 5:
The components of a viral envelope involve phospholipids and membrane proteins and proteins and glycoproteins. The phospholipids and membrane proteins are derived from the host cell. The proteins and glycoproteins are of the viral origin.
Interspecific competition can occur between two different species competing for the same resource in an ecosystem. So for this particular bug population, there may be another insect species that competes for the same food source or another resource, such as material or space for breeding habitat. This can lead to selective pressure, and may result in the different species evolving a more specific diet or inhabiting a niche environment.
Answer:
By not having more offspring.
Explanation:
There are many ways of reaching a zero population growth, but some of them are 0% ethical. But, if the population stops having offspring, there won't be a population growth, instead, the population will decrease in number.
- In 2017 the country with the biggest population was China, and the country with the biggest population growth in that same year was South Sudan, with a 3,83% population growth, according to statista and IndexMundi
- Currently, in 2019, China still is the country with the biggest population, and, as for the highest population growth this year, we will only be able to say with 100% certainty when the year ends.
Hope it helped,
BiologiaMagister
Answer:
0 meters
Explanation:
When we talk about displacement, think that the think of it as the measure of the distance between the starting point of the object, from its end point.
Since we are talking about a lap around a track, it would mean that the starting point is also the end point. So if you started and end at the same point, the distance between it would be 0.
THE DOG HAS 2 BROTHER is the example of discrete data.
The dog has 2 brothers.
<u>Explanation:</u>
Discrete data is the information that can be categorized into a classification. Discrete data is based on counts. only a few finite number of value is possible.
It consists of whole number that are counted rather than measured. It can be classified into two type, one is discrete and other is continuous data, where the discrete is countable of the object and the continuous is measurable one.
The dog has two brother is the example for discrete data because the number can be countable, remaining statement are continuous because they are measurable statement, it is always comes under the data continuous.
