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
Bess [88]
2 years ago
15

In humans, three weeks after conception a structure known as the _____ forms that will continue to develop into the central nerv

ous system.
Biology
1 answer:
Ann [662]2 years ago
8 0

The answer is a neural tube.

You might be interested in
Name two things that increase the amount of nitrogen in the nitrogen cycle
Allushta [10]

The majority of Earth's atmosphere contain 78% is nitrogen, The Nitrogen cycle is the geochemical cycle in which nitrogen is converted into multiple chemical forms. Nitrogen cycle occurs in terrestrial and marine ecosystem. Nitrogen can be converted through both biological and physical process. The processes that are involved in nitrogen cycle are fixation, ammonification, nitrification, and denitrification.

There is limited amount of nitrogen that is useful but <u>increase of fossil fuel combustion, use of artificial nitrogen fertilizer</u> have dramatically increased the amount of nitrogen in nitrogen cycle.

8 0
3 years ago
1. Noah is completing volunteer hours at a local aquarium (Seaworld) during
nika2105 [10]

Answer:

2e

Explanation:fdsas

4 0
2 years ago
HIRRY
Nadya [2.5K]

Answer:

the fourth one. biomagnofication is when an organism ingests other plants or animals that have toxins in them. the toxins are widely distributed

4 0
2 years ago
1. How would the predation of pythons on rabbits affect the population of other large predators such as bobcats and alligators?
Inessa [10]

Q1:

Answer:

Studies have reported that due to predation of pythons on rabbits, the population of other predators is badly affected.

Bobcats are a natural predator of rabbits thus they come in a competition with pythons for food. As pythons are more powerful so they target rabbits more easily than Bobcats. The population of Bobcats has been declined by 90% or more due to the establishment of pythons in the Everglades.

<em>Alligator mississippiensis </em>or American alligators are also abundant in Everglades and just like Bobcats they compete with pythons for their food. They can even kill pythons if pythons are smaller in size than them, but python will kill alligator if he is of smaller size. Although rabbits are food for both alligator and Python but Alligator is a key stone specie and it has very important ecological role, because it digs holes in land that retain water upon rainfall. These water hole provide water in the extreme dry weather and help in survival of other small specie like insects and birds.

So, we can expect the population of Alligator, Bob cats and other small insects and birds to decline rapidly if Python population kept on increasing with same speed.

-------------------------------------------------------------------------------------------------------------

Q2:

Answer:

There is no doubt that Pythons pose serious threat for both humans as well as survival of other organisms like Alligators and birds. However, I donot think that “Python challenge” is a reasonable way to kill or remove Pythons. Because It can threat the lives of many individuals who take part in competition, although they are trained but still they are nor professionals and get training of only few weeks so it is not safe competition.

There should be some strategy of introducing natural predators like Brown beers, Cougars and Alligators which can kill python naturally without staking the life of humans at risk.


Hope it helps!

6 0
3 years ago
When patients do not trust family members to make decisions about their end-of-life treatment, there is a need to appoint a nonf
arsen [322]
Power of attorney is capable act on behalf of someone when a decision can not be made
6 0
3 years ago
Other questions:
  • Suppose a population of insects live in a sandy habitat. some of the insects have tan bodies and some have green bodies. over ti
    5·1 answer
  • What does to wound or pierce with a pointed weapon?
    9·1 answer
  • The fact that little albert learned fear toward not only a white rat but also a ball of wool and a rabbit represents:
    8·1 answer
  • Every time an impulse travels down the axon, we say that the axon has "fired," or "responded." this impulse is also called the
    10·1 answer
  • How did the oil disaster affect at least 2 out of 5 spheres of earth?
    9·1 answer
  • The (blank) is the the height of the wave and measures the amount of (blank) it carries.
    9·1 answer
  • An article in the local paper is discussing a new copper line in New Mexico . It states that all that is needed to identify a su
    10·1 answer
  • Explain the conditions under which the body would concentrate or dilute urine.
    14·1 answer
  • The mass and______of an object affects the momentum of its motion.
    12·2 answers
  • All of the chemical reactions that occur in your body do so in what type of environment
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!