Question

5:Tendons are structures that connect muscle to bone. Athletic training tends to increase the size of the tendon connecting the muscles used during training, so that the tendon operates more efficiently. Which type of tissues are involved?
A:Muscle and connective tissue.
B:Epithelial tissue only.
C:Connective tissue only.
D:Epithelial and muscle tissue.
6:Some organisms may regulate some homeostatic variables, but conform for others.
A:True
B:False

7:If you are told that an organism often uses behavior to control the value of a variable, which if the following is most likely?
A:The variable is under negative control.
B:The variable is under positive control.
C:The organism is a regulator for that variable.
D:The organism is a conformer for that variable.
8:Which of the following statements applies to xylem?
A:Some plants use specially altered xylem tissue in the roots to store sugars over the winter.  
B:Xylem is primarily responsible for moving dissolved sugars from the leaves to other areas of the plant.
C:Since it relies on the properties of water to move materials, xylem cells die at maturity to leave empty tubes that allow water molecules to stay in contact with each other though out the plant.
D:Requires the use of active transport to move material throughout the plant.

Answer 1

Ans.5.  Tendons, which are also known as sinew are bands of fibrous connective tissue made of collagen that connects muscle to bone and can withstand tension. So the correct option shall be Connective Tiisue only.

Ans.6. Regulating and conforming are two extremes or opposite processes in animals to cope with environmental fluctuations.

If an organism uses its internal control mechanisms to moderate or regulate internal change to cope with external fluctuations, it is said to be regulator for that particular environmental variable (Campbell et.al, 2009). Regulators are often referred as homeotherms or endotherms, Example- mammals and birds.

On the other hand, if an organism's internal condition varies with certain external or environmental changes, it is said to be a conformer for that particular environmental variable (Campbell et.al,2009). Conformers are often referred to as ectotherms. Example - reptiles and fishes.

According to biologist Neil A. Campbell, no organism is a perfect regulator or conformer, as these two mechanisms represent extremes on a continuum. An organism may maintain homeostasis while regulating some internal conditions and allowing other internal conditions to conform to the environment. Example- A fresh water fish regulates its internal solute concentration but allows its internal temperature to conform to the external water temperature. So, the correct option is True.