What are the parts of the hiv virus and how do they take part in infecting cells, but also maybe the virus survive?

Envelope, Capsid, Enzymes, RNA, Glycoproteins

Explanation:

HIV is the Human Immunodeficiency Virus which belongs to the retrovirus. HIV infects humans and causes AIDS ( Acquired immunodeficiency syndrome). The several parts of HIV are there;

1. HIV Envelope: It is the outer covering of the HIV.

2. Capsid: it is the HIV core which contains genetic material RNA.

3. HIV Enzymes: Enzymes reverse transcriptase are responsible for the entire life cycle of HIV to synthesize the viral protein.

4. HIV RNA: RNA is the genetic material of HIV.

5. Glycoproteins: These are the protein spikes that are fitted in the HIV envelope.

HIV is a retrovirus which infects the WBCs of the human beings and attached to the helper T-cells (T4 lymphocytes). They control over the host DNA and replicate in the host's cell and synthesize more viruses.

Infectious HIV can be recovered from the dead body of human beings in between 11 and 16 days after death if the body keeps at a low temperature i.e. 2 degree Celsius.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.