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Alona [7]
3 years ago
11

What is a difference between exoskeletons and endoskeletons?

Biology
1 answer:
Sati [7]3 years ago
6 0

Answer: d. exoskeletons are external to the soft tissues, and endoskeletons are internal

Explanation:

The skeleton can be define as the body part of the living beings which act as a supporting structure which maintains the posture and provides the supporting framework to the body. The exoskeleton is the skeletal structure that protects the body from outside. It encloses within it the soft tissues and organs of the body. It is the characteristic feature of the invertebrates. It is the external feature of the body. It also provides protection against the predator. The endoskeleton is the skeletal structure which serves as a attachment point for the muscles. It is the internal feature of the body.

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Why does Dr. Davis emphasize that people need to return to their hometowns to work?
tia_tia [17]

Answer: C. he believes returning to get back will inspire others to make changes and do the same

Explanation:

5 0
2 years ago
What is the concentration of a suspension that grew 89 colonies on a plate with a dilution of 1:100?
mafiozo [28]

Answer:

8900 CFU/mL

Explanation:

Colony Forming Units (CFU) is a value that indicates the degree of microbiological contamination of an environment. It expresses the relative number of microorganisms of a given taxon in a volume of one cubic meter of water.

UFC is the minimum number of separable cells on the surface, or inside, of a semi-solid agar medium that results in the development of a visible colony of the order of tens of millions of descending cells. The CFUs can be pairs, chains or clusters, as well as individual cells. Colony forming unit.

Calculation

Colonies * Dilution = CFU/mL

89          *  (100/ 1 mL) = CFU/mL

8900 CFU/mL

3 0
3 years ago
Briefly explain the causes and effects of acid precipitation.
Ainat [17]
latic acids. cause by milk
chittrus acids. cause by lemon juice
5 0
3 years ago
7. What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second?
nydimaria [60]
Kinetic energy = 0.5*M*V^2 

 Q7-
 
0.5*3*(2^2)= 6J

Q8a- 

0.5*2*(2^2)= 4J
0.5*4*(3^2)=18J 
the second ball has more kinetic energy.

Q8b-

at the max height, all the kinetic energy is converted to potential energy, 

gravitational potential energy is = M*g*h

that theory would apply if you wanted to work out the maximum height achieved if the balls were thrown upward by rearranging. But, we are simply working out which ball will have more potential energy so:

First ball:
2kg*9.81(g)*10m = 196.2J

Second ball
4kg*9.81*10m= 392.4J

The second ball has more potential energy 


5 0
2 years ago
NEED HELP ASAP WILL GIVE BRAINILIEST THANK YOU
Grace [21]

TCTCG and AGAGC are the perfect pair.

Option A

<h3><u>Explanation:</u></h3>

DNA is the genetic molecule of a living cell. The DNA stores genetic information of the species inside itself by means of particular pattern or sequence of nitrogen bases called as gene. The gene is comprised of the particular sequence of nitrogenous bases which are four in number - adenine, guanine, thymine and cytosine.

The nitrogen bases are present in both the strands of DNA and they have complementary relationship between them. The adenine forms hydrogen bonds with thymine and guanine pairs with cytosine.

Here the sequence of one strand is given as TCTCG. So according to the complementary pairing process, the opposite strand must have the sequence of AGAGC to maintain the structure.

4 0
3 years ago
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