The following are important steps in the process of endochondral ossification.
1. enlarged chondrocytes die.
2. osteoblasts replace calcified cartilage with spongy bone.
3. chondrocytes enlarge and the surrounding matrix begins to calcify.
4. blood vessels invade the perichondrium.
5. perichondrial cells become osteoblasts and produce a thin shell of bone.
the correct order for these events is

1. Chondrocytes enlarge and the surrounding matrix begins to calcify

2. Enlarged chondrocytes die

3. Blood vessels invade the perichondrium

4. Perichondrial cells become osteoblasts and produce a thin shell of bone

5. Osteoblasts replace calcified cartilage with spongy bone

Explanation:

Endochondral ossification starts with the formation of the cartilage model. Chondroblasts become buried in the extracellular matrix of cartilage and are called chondrocytes. The growth of the cartilage model is accompanied by an increase in the size of chondrocytes.

The extracellular matrix begins to calcify. Other chondrocytes present within the calcifying cartilage become dead due to nutrient deprivation. The dead chondrocytes leave the space called lacunae. A nutrient artery penetrates the perichondrium and calcifying the cartilage model. It enters through nutrient foremen.

The perichondrium begins to differentiate into osteoblasts which in turn deposit the bone extracellular matrix over the remaining calcified cartilage to form a spongy bone.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set

i believe the correct answer is the virus gets an envelope that contains host molecules when it leaves the host cell.

explanation:

during the bidding/release stage of a virus, it encapsulates itself with part of the membrane of the host cells in this case the cells of the monkey and is the reason as to why the scientist found the genetic material of the monkey on the viral cell surface.

further explanation

to understand this answer, we have to know the cycle a virus undergoes to replicate. a virus is basically a bunch of genetic material enclosed in a capsule and lacks any machinery or organelles to ensure their survival so they must enter a host cell in order to get the environment needed to survive. some viruses enter and lyse(destroy) the host cell after they have replicated and undergo the lytic cycle while some enter and leave the cell intact after replicating and these undergo a lysogenic cycle. to enter the cell, they undergo the first process called attachment by binding to specific receptors and co-receptors on the surface of the host cell. after attaching to the cell, they start the second phase called penetration where virus enters or is engulfed whole by the host cell through a process called endocytosis. it is the same process that a cell takes up materials it needs or pathogens around it. uncoating of the virus then happens after the virus has been engulfed and is the third stage. the virus then undergoes releasing of its genetic material in the host's matrix.   the materials then enter the nucleus and undergo biosynthesis by adding themselves in strands of rna being translated and then copies of the virus are produced in addition to the host genetic material. the material/newly formed viral material then undergoes assembly inside the host cell and form a capsule around them. the virus undergoes the last release/budding stage by binding to the host membrane and pushing outwards. in doing so when they tear away from the host membrane, they pick up the genetic material from the membrane of the host cell to form their envelope.

learn more:

1.

2.

3.

level: high school