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Taya2010 [7]
3 years ago
12

What helps the plasma membrane function? channels and chain-like structures O pumps and gelatin-like material O nuclei and endop

lasmic reticula O chloroplasts and mitochondria​
Biology
1 answer:
12345 [234]3 years ago
8 0

Answer:

channels and chain-like structures

Explanation:

The plasma membrane contains channels that favor the transport of materials from both sides, i.e., from the intracellular medium to the extracellular environment. Membrane channels are a class of proteins that enable the passive transport of ions and chemical compounds by using the electrochemical gradient in both sides of the membrane. For example, channel proteins in the cell membrane known as aquaporins enable the transport of water across the cell membrane much more rapidly than by diffusion across this barrier.

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Why are there more debates than answers when discussing stem-cell research?
julia-pushkina [17]
The debate<span> you refer to is about the ethics of embryonic </span>stem cell research<span>. And, of course, since ethics is involved many would tend to oppose further research on this area because to them it violates  and does not respect life. Hope this helps. Have a nice day.</span>
8 0
3 years ago
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Which broad approach to science deals with ancient archaeology and anthropology? descriptive science operational science histori
Jobisdone [24]

Answer:

historical science

Explanation:

Historical science is a broad approach to science deals with ancient archaeology and anthropology.

Archaeology is defined as the part of science in which humanity is studied on the basis of the material remains of human behavior. Archaeology analyses the things or materials used in the past and focus on the evolution of human culture.

Anthropology also studies humanity and focus on human biological and cultural evolution and compare it with modern cultures.

Hence, both ancient archaeology and anthropology have roots in history, so the correct option is "historical science".

6 0
4 years ago
2. Why is PCR helpful to forensic scientists?
Sophie [7]
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3 0
3 years ago
Do you think true water-conducting tissue is a derived character of either embryophytes or green algae? Why or why not?
ludmilkaskok [199]

Answer:

i think true water-conducting tissue is a derived character of green algae?

Explanation:

WHY?

Many characteristics of land plants also appear in algae like both are multi cellular, euks, photosynthetic autotrophs so are brown, red, and certain green algae, plants have cell walls made of cellulose and so do green algae

However, charophytes are the only present day algae that share these traits with land plants

1.Rings of cellulose-synthesizing proteins (circular rings of proteins in plasma membrane that make cellulose of cell wall)

2.Structure of flagellated sperm

3.Formation of a phragmoplast ( group of microtubules known as phragmoplast formes b/t daughter nuclei of a dividing cell, giving rise to a cell plate making cross wall that separates the daughter cells)

Comparisons of both nuclear and chloroplast genes point to charophytes as the closest living relatives of land plants

Land plants are not descended from modern charophytes, but share a common ancestor with modern charophytes

WHY NOT?

The origin of embryophytes, as these multicellular plants arose and conquered the land, was a pivotal event in the history of life on earth. Without embryophytes, there would be no animals or humans surviving on the land portion of our planet. The provide food, habitat, energy, oxygen, protection, and numerous vital other functions for the world's creatures. Human beings also benefit from the aesthetic beauty, medicines, and innumerable products derived from these diverse plants.

8 0
3 years ago
Stems ___ ?
Xelga [282]
B. Stems absorbed water and minerals from soil
Hope this helps! :)
6 0
4 years ago
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