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
ANTONII [103]
3 years ago
12

A scientist owns a company that is producing a new chemotherapy drug and the scientist is doing the research?

Biology
1 answer:
inessss [21]3 years ago
7 0
I don't really understand... my point is every drug on earth MUST be tested on humans eventually. human testing is allowable only if the previous tests (on tissue in vitro cultures and on animals) went enormously well and promising. if there is any chance that a new chemotherapy drug works then it should be tested on humans. remember that every patient willing to test a drug signs a proper consent prior to clinical trial.
You might be interested in
A single strand of dna helic has the code cgctaa. Which would be the complemntary code on the other strand of the helix
Damm [24]
It would be GCGATT. C always compliments G and A always compliments T in the case of DNA coding
6 0
3 years ago
What is an example of a density dependent factor
enyata [817]

Answer:

In nature, limiting factors affecting population sizes include how much food and/or shelter is available, as well as other density-dependent factors. Density-dependent factors are not relevant to populations that are below "carrying capacity," (i.e., how much life a habitat can support) but they start to have to become noticeable as populations reach and exceed that limit. The degree of control imposed by a density-dependent factor correlates to population size such that the effect of the limitation will be more pronounced as population increases. Density-dependent factors include competition, predation, parasitism and disease.

Competition

Habitats are limited by space and resource availability, and can only support up to a certain number of organisms before reaching their carrying capacity. Once a population exceeds that capacity, organisms must struggle against one another to obtain scarce resources. Competition in natural populations can take many forms. Animal communities compete for food and water sources whereas plant communities compete for soil nutrients and access to sunlight. Animals also vie for space in which to nest, roost, hibernate, or raise young, as well as for mating rights.

Predation

Many populations are limited by predation; predator and prey populations tend to cycle together, with the predator population lagging somewhat behind the prey population. The classic examples of this are the hare and the lynx: as the hare population increases, the lynx has more to eat and so the lynx population can increase. The increased lynx population results in more predatory pressure on the hare population, which then declines. The drop in food availability in turn causes a drop in the predator population. Thus, both of these populations are influenced by predation as a density-dependent factor.

Parasitism

When organisms are densely populated, they can easily transmit internal and external parasites to one another through contact with skin and bodily fluids. Parasites thrive in densely packed host populations, but if the parasite is too virulent then it will begin to decimate the host population. A decline in the host population will in turn reduce the parasite population because greater distance between host organisms will make transmission by more difficult.

Disease

Disease is spread quickly through densely packed populations due to how close organisms are to one another. Populations that rarely come into contact with one another are less likely to share bacteria, viruses and fungi. Much like the host-parasite relationship, it is beneficial to the disease not to kill off its host population because that makes it more difficult to for the disease to survive.

7 0
3 years ago
Why does venous return from the distal arm travels in the superficial veins and those veins tend to bulge superficially in a per
olganol [36]

Blood distribution is adjusted by a short-term neural control mechanism to meet specific demands. During working out, the hypothalamus signals for reduced vasomotor stimulation of the skin vessels. Blood moves into the capillary veins, and heat radiates from the skin to reduce body temperature.

<h3>Veins</h3>

All over your body, veins are blood vessels that collect blood with low oxygen content and send it back to your heart. Your circulatory system includes your veins. They cooperate with your heart, other blood vessels, and other organs to maintain blood flow. Most of your body's blood is stored in veins. Your veins actually contain around 75% of your blood. Veins have two basic functions. One function is to gather blood that is low in oxygen throughout your body and transport it back to your heart. The other function is to transport blood that is rich in oxygen from your lungs to your heart. Only during this process do veins transport oxygen-rich blood.

Why does venous return from the distal arm travels in the superficial veins and those veins tend to bulge superficially in a person who is working out?

Learn more about veins here:

brainly.com/question/12884867

#SPJ4

3 0
2 years ago
When an individual stops breathing, brain cells die very quickly, but the cells in the heart are able to survive for longer. Whi
tino4ka555 [31]

Answer:

because the blood in the heart gets what's left of oxygenated blood first. first come first serve concept. the heart cells survive longer because they have oxygenated blood longer and more frequently. if the person is not breathing the oxygen in the blood might run out by transferring to cardiovascular cells before it gets to the brain.

Explanation:

8 0
3 years ago
What polygons are represented in tangram
IRINA_888 [86]

Answer:

Parallelogram

Rectangle

Triangle

Square

Explanation:

3 0
3 years ago
Other questions:
  • Assuming that it will rain when the sky is cloudy and dark is an example of a(n) _____.
    14·2 answers
  • What might be a possible outcome if you left a soda in a glass bottle in the hot sun for a very long time?
    9·1 answer
  • The main purpose of models is to gain a better understanding of the world. T/F
    14·2 answers
  • If you are not getting adequate calcium in your diet, calcitonin will be secreted, which stimulates osteoclasts to resorb bone a
    8·1 answer
  • In this assignment, you will use your knowledge of the central nervous system to answer a few questions. You then will explore t
    12·2 answers
  • How many regions of the world have four distinct seasons?
    5·2 answers
  • Which shows the levels of organizational hierarchy listed from least complex to list complex
    6·2 answers
  • Match the various types of intrusive rock.​
    12·1 answer
  • A plant is placed near a window. Instead of growing straight up, the plant grows to the side. What is this plant demonstrating?(
    8·1 answer
  • Please help asap
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!