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AlladinOne [14]
3 years ago
13

What is the current greatest threat to agricultural sustainability?

Biology
2 answers:
AnnZ [28]3 years ago
8 0
I'd say water pollution B
Korolek [52]3 years ago
8 0
A this is because current is the spontaneous movement of water therefore with that force on agricultural soil will wear away the soil
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Unicellular and simple multicellular organisms isolate and eliminate waste materials by:
elixir [45]

Answer:

The correct option is d.

Unicellular and simple multicellular organisms isolate and eliminate waste materials by: <u>moving the wastes into a contractile vacuole and eliminating them through exocytosis.</u>

Explanation:

In all living systems, from prokaryotes to more complex multicellular eukaryotes, the regulation of substance exchange with the inanimate world occurs at the level of the individual cell and is performed by the cell membrane. The cell membrane regulates the passage of materials into and out of the cell, a function that makes it possible for the cell to maintain its structural and functional integrity. This regulation depends on interactions between the membrane and the materials that pass through it. Non-assimilable substances accumulate in vacuoles or fuse with the plasma membrane, and exocytosis expels their contents.

Exocytosis is an inverse process of endocytosis, in which an intracellular vesicle approaches the plasma membrane fusing with it so that the content of said vesicle is poured into the extracellular environment. By exocytosis, the cell can expel the remains of the cell digestion process that are not useful to it and also the secretion products from the Golgi apparatus in the form of secretory vesicles. If too much water enters the cell, it could dilute the cell contents to the point of interfering with biological functions and could eventually break the cell membrane. In the Paramecium, there is a specialized organelle, the contractile vacuole, which prevents this from happening since it collects water from various parts of the cell and pumps it out with rhythmic contractions.

5 0
2 years ago
Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the in the exchange of gtp
Artist 52 [7]
RAS is a very important protein that belongs to a class of protein referred to as GTPases and plays a crucial role in switching on pathways that control cell growth, proliferation, apoptosis and differentiation and migration. For RAS to become inactive it must hydrolyze GTP to GDP which slows down the process of cell proliferation. Mutation in one copies of RAS will result to cancer because the mutated copy will permanently attach to GTP and remain in activated form which will lead to uncontrollable cell division and hence development of cancer.  
3 0
3 years ago
Read 2 more answers
How does the chemical equation for cellular respiration compare The one for photosynthesis
Iteru [2.4K]

Answer:

Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O. Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.

Explanation:

5 0
2 years ago
How do you graph a seed germination
ZanzabumX [31]

You can either empty the graph in the data sheet or you can make your own graph

3 0
2 years ago
Choose one the correct types of weathering and type it in the box exactly as it is written!
WITCHER [35]

Answer:

1st picture: water

2nd picture: wind

3rd picture: ice wedging

4th picture: exfoliation

5th picture: oxidation

6th picture: plant root

7th picture: animal

8th picture: acid rain

9th picture: abrasion

Explanation:

Hope this helps

7 0
2 years ago
Read 2 more answers
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