BIOLOGY HIGH SCHOOL

A specific type of physical change is a _________ change.chemical

bond

covalent

phase

Answers

Answer 1
Answer: A specific type of physical change is a phase change

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Where is the genetic material of a virus located?

Answers

The structure of virus consists of viral genome, nucleocapsid, tegument, envelope, and envelope protein. The genome is present in the Nucleocapsid.

The simplest of viruses are composed of genetic material and protein or capsid. Viruses do not produce many structural elements however some viruses may have an additional proteinaceous structure around the genetic material called nucleocapsid and a lipid bilayer covering the outer capsid layer called the envelope. The capsid is there to protect the genetic material from degradation. The viral envelope is derived from the host cell membrane and the virus encoded proteins. The sugar moieties attached to those proteins and this feature influences and contributes to the host specificity, host-parasite interaction etc.

The nucleocapsid protein is encoded by the gag gene in HIV virus and in coronavirus, it is the one present in greatest abundance and highly antigenic.

The virus structure varies among the different families and at the least has a capsid and in some there might be a nucleocapsid additionally covering the genetic material of the virus.  It is either a capsid or the nucleocapsid and capsid that covers the genetic material.

The viral genetic material is covered by capsid and nucleocapsid.

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The genetic material of a virus is located inside its capsid.

During a microscopic view of reproductive stages of bacteria cells, a tube connecting two bacterial cells was noticed.Which mode of reproduction in prokaryotes does this depict?




binary fission




conjugation




spore formation

Answers

Pretty sure it's B. Conjugation because that is a form of sexual reproduction in the reproduction of prokaryotes.
The answer is B Conjugation

8. Unlike weather, climate A. describes the average conditions and atmospheric patterns of a region over time.
B. describes the day-to-day condition of the atmosphere of Earth.
C. involves variations in precipitation.
D. involves variations in temperature.

Answers

Unlike weather, climate describes the average conditions and atmospheric patterns of a region over a period of time. Weather is the day-to-day atmospheric conditions. It includes windy days, sunny, rainy, cloudy and etc. Weather then describes the state of an atmosphere at a place and time to its heat, dryness, sunshine, wind, rain. Climate on the other hand is the prevailing conditions of an area over a period of time, for instance, tropical climate.
It is climate (A) that describes the average conditions and atmospheric patterns of a region upon the Earth, over a period of time. It is distinctive from the weather which describes the specific meteological activity taking place at a specific time and in a specifc location upon the Earth.

How does meiosis help to maintain the continuation of a species?

Answers

Meiosis is the reproduction of cells that don't exchange DNA, its important because if you have a cut on your hand, you wouldn't want mitosis to go through or you could end up with a stomach sell on your hand. Meiosis reproduces the same type of cell, for example somatic cells(human cells).
Meiosis provides genetic diversity. Mitosis is used in most cell reproduction (which is fine when they do the same job). Meiosis is like sexual reproduction for cells, with the acceptation that there is only one parent cell.

Compare a theory to a hypothesis.

Answers

A theory is something that might happen. A hypothesis is a close guess to the answer.

Which food does NOT support progressive bacterial growth?a. Cooked potatoes.
b. Uncooked rice
c. Cut watermelon.
d. Cooked beef.

Answers

My answer is A. Cooked Potatoes. Temperature is one of the factor why bacteria will grow and produce. If a temperature of a food is more than 70% in just 10 minutes in heating time, bacteria wont grow fast. I choose the potato because the cooked beef will shortly grow bacteria when its exposed to an oxygen 
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