The answer is 44 chickens and 28 rabbits.
We have a system of two equations.
x - the number of rabbits
y - the number of chickens
Both chicken and rabbit have only 1 head, so the first equation is: x + y = 72.
Since rabbits have 4 legs and chickens 2 legs, the second equation is: 4x + 2y = 200.
Now, let's solve the system:
x + y = 72
4x + 2y = 200
___________
y = 72 - x
⇒ 4x + 2 · (72 - x) = 200
4x + 2 · 72 - 2 · x = 200
4x + 144 - 2x = 200
2x + 144 = 200
2x = 200 - 144
2x = 56
⇒ x = 56 ÷ 2 = 28
So, there are 28 rabbits.
Since
y = 72 - x = 72 - 28 = 44,
there are 44 chickens.
Answer:
Mitochondria, endoplasmic reticulum, golgi apparatus, or chloroplasts would all be an example.
Explanation:
Unlike prokaryotic cells, eukaryotic cells have a nucleus enclosed in a plasma membrane, as well as the mitochondrias, endoplasmic reticulums, golgi bodies or apparatuses, and chloroplasts.
Answer: d. Predators avoid prey that are in their prime in order to maintain a high reproductive rate in the prey population, and hence 'grow' prey for the future.
Explanation:
A predator can be define as an organism superior and strong enough to kill inferior and weaker organism. This organism kill other organism to obtain it as food. A prey is an organism which is weak and cannot defend itself from the attack of the superior organism.
d. is the correct option. This is because the predators do not bother about the age and strength of the prey. They attack over them whether the prey is weak , young, prime, or old and try to obtain it as food.
Mirror neurons are said to be the factors behind social imitation. Neurons are the main cell of the nervous system which is responsible for communication of organs and control of many bodily functions. In an evolutionary standpoint, mirror neurons are an advantage because humans are able to replicate and imitate skills, behaviors and practices which they find beneficial and advantageous in the wild. Among their social peers, mirror neurons help these individuals practice social inclusion through culture, values and practices for increased group cohesion and cooperation.
