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Natalija [7]
3 years ago
12

Which tissue produces hcg in very early pregnancy?

Biology
1 answer:
Galina-37 [17]3 years ago
5 0
The tissue is placental tissue.
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Horatio is studying an abandoned farm in his community. The land of the farm once supported fields of corn, beans, and spinach,
Feliz [49]

Answer: C. The farmland is undergoing secondary succession, which may or may not restore the original climax community.

Explanation:

Ecological communities are highly <em>dynamic</em>- they gradually evolve. Typically their progression involves:

  • colonizing species exploiting uninhabited areas (Primary succession)
  • becoming a habitable and increasingly complex community
  • there is increased diversity of organisms (Secondary)

The makeup of biological communities is crucial to defining Primary and Secondary succession; eventually, through changes in this makeup, a steady-state or equilibrium is reached called a <em>climax community. </em>While Primary succession starts off with the modification of a previously unoccupied area along with increasing variation; secondary succession begins after major disruption in the community such as fires, storms and flooding.

Like the abandoned farmland near Horatio’s home, secondary communities do not begin with the removal of soil and all biological life; other species, seen here in the grassland, may be more suited to the altered conditions and begin to modify the area creating a new community.

However, the process of becoming a climax community can be pretty complicated- it is very dependent on other factors like temperature and rainfall. Communities that experience rapid change, frequent major disruptions and even human intervention, are less likely to attain a stable equilibrium and may never become climax communities.

4 0
3 years ago
Organisms in the same ecosystem are all _______.
Ierofanga [76]
The answer is Independent
5 0
3 years ago
Where is most of the water located on earth
Levart [38]

Answer:

The Ocean

Explanation:

Most of the water on Earth is located inside of the ocean.

3 0
3 years ago
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As DNA replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two
Korolek [52]

Answer:

DNA replication is initiated by the help of these enzymes.

Explanation:

Helicase enzyme helps is unwinding the two complementary strand of DNA by hydrolysing the hydrogen bonds present between the nitrogenous bases of the two opposite strands.

Topoisomerase enzyme help in expansion of the Replication bubble by releasing the super coiling or tension occured while unwinding by helicase. It breaks the phosphate bonds in one of the two strands ahead of replication bubble or fork to release super coiling or overwinding.  

Single-strand binding proteins gets bind to the separated strands to stabilize the structure of Replication bubble or to keep the both strand separated from each other.

4 0
3 years ago
Which of the following occupations would plan and conduct an experiment to analyze the quality of groundwater?
Olegator [25]
Hello,

The answer is option D "<span>natural science technician".

Reason:

A natural science technician studies in natural resources for example: water or ground water.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit</span>
3 0
3 years ago
Read 2 more answers
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