Which of the following statements is/are true? a. loose connective tissue includes cartilage. b. closely packed bundles of collagen fibers are characteristic of loose connective tissues. c. dense irregular connective tissue has a high proportion of elastic fibers. d. dense connective tissue is dominated by collagen fibers.

d. Dense connective tissue is dominated by collagen fibers.

Explanation:

Bones and cartilage are the supporting connective tissue while loose and dense connective tissues are categorized as the connective tissue proper. Cartilage does not have nerves and blood vessels in its extracellular matrix.

Loose connective tissues have the fibers loosely arranged between the cells while the dense connective tissues have tightly packed fibers.

Both dense regular and irregular connective tissues mainly have a high proportion of white collagen fibers. Tendons and ligaments are the examples of dense regular connective tissues while the dense irregular connective tissues are present in the inner location of the skin.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.