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olga55 [171]
3 years ago
13

How do lymphatic vessels differ in structure from veins?

Biology
1 answer:
rusak2 [61]3 years ago
6 0
They are different in structure as one serves in an open system (lymphatic system) while the other serves is closed system (circulatory system).

Hope this helps!
*This question is common, so this answer I use a lot. I copied my own work.*
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How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater
Sveta_85 [38]

Answer: Contractile vacuole of amoeba will shrink/contract when the organism is placed in sea water.

Contractile vacuole is a subcellular structure ( mainly found in protists) that is involved in the regulation of water quantity inside a cell.

As we know that water always flow from a hypotonic ( where solute concentration is less) to a hypertonic ( where solute concentration is more) solution. Sea water is a hypertonic solution as the concentration of salt is very high. Therefore, in this case, water will flow from contractile vacuole to outside of the organism.

Thus, contractile vacuole of amoeba will contract as it will lose water when placed in sea water.

8 0
2 years ago
Which of the following is true of the bones of the forearm?
Elza [17]

Answer: b. The radius forms the point of the elbow

c. The radius articulates to the wrist closest to the thumb

Explanation:

Ulna and radius are the two bones of the forearm. These bones articulates with the humerus and carpels of the hand.

b. The radius forms the point of the elbow: The elbow joint is the hinge joint that forms between the proximal ends of the radius and ulna in the forearm and distal ends of the humerus. The radius forms a pointed end.

c. The radius articulates to the wrist closest to the thumb: The wrist forms a complex joint. It forms a transition between the hand and the forearm. The radial deviation in the wrist forms the basis for the movement of the tilting of the wrist joint towards the thumb.

8 0
3 years ago
How can we predict which elements are reactive under normal conditions and which are unreactive?​
mr_godi [17]

Answer:

We can predict or comment about reactivity of elements by taking into consideration their electronic configuration that imparts stability or un-stability to an atom.

Explanation:

Reactivity : It refers to the affinity of a substance to combine with other substance .

Elements are mainly of two types :

  • Metals and Non metals

In terms of metals or non metals it can be defined as tendency to loose or gain electrons .

  • On the basis of it ,we can easily make out or comment about the reactivity of element (metal or non metal ) .Like ,if an element has completely filled outermost shell or we can say have stable electronic configuration then it is already stable .Therefore , it won't react with any other element .
  • But, if its outer shell isn't complete then in order to attain stability it will combine or react with other .Hence , we can say it will be quite reactive .
7 0
3 years ago
All animals with eyes or the eyespots that have been studied so far share a gene in common. When the gene causes lack of eyes in
RSB [31]

Answer:

The correct answer is option C.

Explanation:

PAX5 refers to the member of the Pax gene family, which is, accountable for conducting the genetic information, which will encode the Pax-6 protein. It functions as a master control gene for the maturation of eyes and other sensory organs. Pax6 functions as a regulator in the formation of patterns and coordination needed for the proliferation and differentiation to take place effectively. This ensures that the procedures of oculogenesis and neurogenesis are taking place efficiently.  

The PAX6 gene was the outcome of evolution in earlier animals comprising eyespots or eyes. The similar PAX6 gene generates distinct kinds of eyes in distinct species because of the difference in its control of PAX6 expression. At the time of the evolution of vertebrates, the biological clock opsin’s rh gene was chosen as a gene for visual receptor pigments.  

8 0
3 years ago
If you wanted to know if a particular mountain was formed by movement along a fault, what would you look for
EleoNora [17]
If the mountain was in the Front Ranges of the Rockies, I would look for a thrust fault underlying the mountain since thrusting is a low angle fault which juxtaposes older rocks on top of younger and thickens up the stratigraphic sequence. Also, mountains can form from normal faults whereby the hangingwall of the fault  or the side of the fault which is towards the inclination of the fault drops down relative to the footwall (the side under the fault) so I would also look for a normal fault bounding a cliff face of the mountain.,
7 0
3 years ago
Read 2 more answers
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