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Reil [10]
2 years ago
5

As Ben approached and began his retirement he planned a variety of

Biology
1 answer:
lozanna [386]2 years ago
7 0
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Considering the drifting of continents, how do you explain the abundance of marsupials and the absence of native placental mamma
garri49 [273]

Answer:

this phenomenon is a natural consequence of evolutionary processes and continental drift  

Explanation:

Marsupials are mammals in which newborn offspring are carried in a pouch of the female (mother) body. On the other hand, placentals are mammals that complete embryo development in the mother's body, in the placenta. All the extant marsupials are endemic to Australia and the Americas. It has been shown that marsupials diverged (evolved) in South America, Australia and Antarctica when these landmasses were joined. In Australia, marsupials evolved to fit an ecological niche, which can be attributed to geographic isolation due to continental drift, while placental mammals are relatively recent and more scarce (mainly bats and rodents) within this region.

5 0
3 years ago
Mrs. b is a 30-year-old african american woman with two children. she is employed at a workplace that does not provide the emplo
stiv31 [10]
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4 0
3 years ago
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Which characteristics must an object posses in order to be considered alive?
enot [183]
The object has to possess movement, growth and development, response to stimuli, reproduction, use of energy and possession of cellular structures.
HOPE THIS HELPS!
5 0
3 years ago
Read 2 more answers
Which statement is true A.An organism is part of a community. B.Acommunity is part of population C.An ecosystem is made up of on
NikAS [45]
<h2>(A) is the correct option </h2>

Explanation:

  • An organism is part of a community is correct,where species interaction occurs between different organisms
  • A community is part of population is the incorrect statement because a community includes group of population of two or more different species
  • An ecosystem is made up of only organisms is the incorrect statement because ecosystem is the community of both living and non living components of the environment and how they interact with each other
  • A biome is the biotic part of an ecosystem is incorrect because biome includes the community of both plants and animals occupying a large habitat
4 0
3 years ago
Cells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell memb
aniked [119]

Answer:

B (active transport using ATP)

Explanation:

Movement of substances normally occur in the direction of concentration gradient/difference i.e. the difference in concentration of a substance across a membrane. Letting molecules diffuse or pass down their concentration gradient does not require energy but pumping those molecules against gradient requires energy in form of Adenosine triphosphate (ATP). This process is called Active transport.

In order to perform certain cellular processes, cells need to move substances from their surroundings into the cell across their cell membrane. Moving this substances against the concentration gradient between the cell membrane and its extracellular fluid requires energy (ATP).

An example is the sodium-pottasium pump employed by animal cells in which they expend energy to move K+ molecules into the cell and Na+ molecules outside the cell against the concentration gradient of their cell membrane and extracellular solution.

5 0
3 years ago
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