Considering how the body is organized, give one reason why it is so difficult for scientists to build a heart.

A)
The heart is a pump made of muscle and that is difficult to grow in the lab.

B)
Even if researchers build a heart, there is no guarantee that a person's body will accept it.

C)
Human hearts are not like any other animal hearts so there is not source for cells and tissues.
Eliminate

D)
The heart is made up of many different types of cells that are organized into different tissues.

Which statement best explains how cellular respiration maintain homeostasis in animals? it maintains body temperature by absorbing energy. it breaks glucose into energy required by the organism. it speeds up metabolism by making oxygen. it produces energy from hormones present in the organism.

How do you date a sample of rock that you suspect as being one of the earliest on earth

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.