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Natalka [10]
3 years ago
12

Which two structures would provide a positive identification of a plant cell under a microscope?

Biology
1 answer:
svetoff [14.1K]3 years ago
4 0
The two structure that would provide a positive identification of a plant cell under a microscope would be Plasma Membrane and Large Central Vacuole. 

Hope this helps! Enjoy! :)

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Hypothalmus hannels information from sensory nerves to the endocrine system via the ________ gland.
11Alexandr11 [23.1K]
I would imagine it is the pituitary gland
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3 years ago
Which property results from the crystal lattice structure of ionic compounds? A. low melting point B. good electrical conductivi
lions [1.4K]

Answer:

C.) crystalline solids

Explanation:

The solid materials may be crystalline or amorphous. The concept of crystal structure is related to the organization of atoms in a geometrical form. Crystalline structures are present in various materials, where atoms distributed within their structure form a network called the crystalline lattice. Therefore, crystalline structures have salts, metals and most minerals. Crystalline structures are formed by unit cells that are their basic unit, as they constitute the smallest set of associated atoms found in a crystalline structure.

The molecules of the crystalline structures can have two types of bonds, the directional ones, which include the covalent and dipole dipole and the non-directional ones where the metallic, ionic, van der Walls bonds. When formed by ionic compounds, these crystalline structures can result in crystalline solids.

5 0
4 years ago
Whats the requirement of every single natural process on earth ​
irina1246 [14]

Answer:

The answer to this question is energy.

Explanation:

All the natural processes taking place on this Universe requires Energy. We have energy stored in different forms in all objects on earth. Like chemical energy is responsible for different chemical reactions for example the formation of ATP in living organisms. Thermal energy that is present in the form heat and Kinetic energy is present in moving objects. Energy can not be created or destroyed. However it can be change from one form to another.  That's how all the processes on earth keep going.

7 0
3 years ago
Read 2 more answers
Which is the pair of the enzyme activities most significantly affected by glucagon- and insulin-dependent phosphorylation and de
prisoha [69]

Answer:

b. Phosphofructokinase;  Fructose-1,6-bisphosphatase

Explanation:

Glucagon is a hormone which functions to initiate gluconeogenesis whwreas insulin functions to initiate glycolysis.

Fructose-2,6-bisphosphate (F26BP) is an allosteric regulator of the <em>glycolytic and gluconeogenic enzymes phosphofructokinase-1 (PFK-1) and fructose-1,6-bisphosphatase (FBPase-1).</em>

It stimulates glycolysis and inhibits gluconeogenesis by binding to its allosteric site on phosphofructokinase-1 reducing its affinity for the allosteric inhibitors ATP and citrate .

It is formed by phosphorylation of fructose-6-phosphate catalyzed by  <em>phosphofructokinase-2</em> and is broken down by <em>fructose-2,6-bisphosphatase </em>which are two separate enzymatic activities of a single, bifunctional protein (PFK-2/FBPase-2).

Phosphorylation of PFK-2/FBPase-2 due to glucagon release enhances its FBPase-2 activity thereby stimulating gluconeogenesis and inhibiting glycolysis.

Dephosphsorylation of PFK-2/FBPase-2 due to insulin release enhances its PFK-2 activity, thereby stimulating glycolysis and inhibiting gluconeogenesis.

3 0
4 years ago
please help :) Which statements are real-world applications of life science? Check all that apply. Farmers study plant growth an
MAXImum [283]

Answer:

All of the above

Explanation:

4 0
4 years ago
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