1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Roman55 [17]
3 years ago
8

Which of the following is true regarding cultivation and isolation of animal viruses? A. Mouse models are available for virtuall

y all human viral infections and can be routinely used for vaccine development. B. Viruses can be easily grown in liquid culture without any other organisms present. C. The preferred and widely used method of viral isolation and growth is via growth in an embryonated egg. D. Diploid cell culture lines, developed from human embryos, are widely used for culturing viruses that require a human host.
Biology
1 answer:
lesya692 [45]3 years ago
7 0

Answer: D.

Explanation:

Viruses can be cultivated within appropriate hosts, such as a living cell . For example, bacteria are grown in an acceptable growth medium to research bacteriophages; then bacteriophagi are added. Within the bacteria, the bacteriophages replicate and greatly increase their numbers.

Diploid cell lines (or strains) are subcultured approximately 100 times before death. A lot more useful in the laboratory and they can be kept in liquid nitrogen forever. The human embryonic fibroblasts are one example of this kind.

As diploid cell line, developed from human embryos have more accurate results and can be stored for longer period of time, they are widely used in cultivation and isolation of viruses that require human hosts.

Hence, the correct option is D.

You might be interested in
Units of volume can be ml or cm3. which unit would normally apply to irregularly-shaped solods
Finger [1]
Cm3 unless its luiquid right
? hope this helps
4 0
3 years ago
What do you think would happen if a genetic mutation caused a person's digestive tract to have stratified columnar epithelium in
Eddi Din [679]

Answer:

Absorption and secretion would be impossible within the digestive tract.

Explanation:

Epithelium is one of the tissues found in humans. It is classified as either simple or stratified depending on the number of cell layers. Simple epithelial tissues have one layer of cells while stratified have many layers of cells. Based on the shape, epithelial tissues can either be squamous, columnar or cuboidal.

Due to the single-layer of the simple epithelial tissues, they line the walls of secretory or absorptive organs e.g organs of digestive tract. The stratified epithelium is majorly for protective function due to the number of cell layers it possess and not a good type of epithelium for locations where absorption and secretion of substances is common e.g digestive tract.

Hence, if a genetic mutation causes a person's digestive tract to have stratified columnar epithelium instead of simple columnar epithelium, ABSORPTION AND SECRETION of chemical substances, which is a key feature of organs (stomach, intestine) that make up digestive tracts, will be impossible.

8 0
4 years ago
What is a biological tropism?
kondor19780726 [428]

Answer:

A

Explanation:

Living organisms adapt to their moves and positions in response to the environmental changes for their protection or to their advantage. When an entity reacts to the changes in its surroundings, it is referred to as stimulus while the reaction to the stimulus is referred to as a response. Common stimuli are sound, light, air, heat, smell, taste, water and gravity.

Think of burning your finger of fracturing your bone without any pain sensation. It may certainly sound like a superpower or an ideal situation, however, when it comes to the standpoint of survival, it can be disastrous.

It is a characteristic behaviour of living entities to respond to stimuli with the intervention of the Nervous System. It is an organ system ascribed to send signals from the spinal cord and the brain throughout the body and then back from all the body parts to the brain. Neuron acts as the mediator and is the basic signalling unit of the Nervous system.

Pain is the body’s way of letting us know that something is not right. It can prevent further injuries or push us to seek medical attention. Moreover, all of this is possible because humans can respond and react to stimuli due to control and coordination among the various organs and organ systems.

Control and Coordination in simple multicellular organisms take place through only the Nervous system which coordinates activities of our body. It is the control system for all our actions, thinking, and behaviour.

4 0
2 years ago
What discoveries has space technology helped paleontologists with?
ladessa [460]
I think the answer is C but i am sorry if i am wrong i took this test but i am pretty sure it is C have a good day and good luck on the test
7 0
3 years ago
Read 2 more answers
Observation: characteristics of cockroach. There are<br>pairs of walking legs.​
Lina20 [59]

Answer:

<h2>Cockroaches are generalized insects with few special adaptations, and may be among the most primitive living Neopteran insects. They have a relatively small head and a broad, flattened body, and most species are reddish-brown to dark brown. They have large compound eyes, two ocelli, and long, flexible antennae.</h2>

three pairs

Thorax. On the thorax, all cockroaches have three pairs of legs. Adults of most of the domestic species have two pairs of wings, although one species, the oriental cockroach, has poorly- developed wings in both sexes.

8 0
3 years ago
Other questions:
  • Unlike microtubules, which operate in the cilia and flagella, what is the role of microfilaments in eukaryotic cells? anchor cel
    13·1 answer
  • What is the main difference between aerobic respiration ?
    9·1 answer
  • What sensors in our skin are responsible for the sense of touch?
    11·2 answers
  • The cell cycle is a series of events that take place in a cell, leading to its growth, division and duplication. Cell division r
    7·2 answers
  • The filtration membrane includes all except ________.
    14·1 answer
  • reasoning from isolated observations to general principles is called _________. _________ means using general principles to make
    12·1 answer
  • What are thhe main differences between plant and animal cells
    7·2 answers
  • Identify the natural processes that occur on the Earth’s surface to make and destroy rocks
    11·2 answers
  • Help please I need it NOW
    7·2 answers
  • You catch, tag, and release 35 fish back into a pond. Then, you catch 70 more fish, 12 of which have tags on them,
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!