Which soil region is the top layer of surface litter, such as twigs and leaves?

a. A horizon
b. B horizon
c. C horizon
d. D horizon
e. O horizon


E

Biology & Microbiology

You might also like to view...

The relative percentage of genes devoted to protein synthesis in small-genome organisms is high compared with that of large-genome organisms

Indicate whether the statement is true or false.

Biology & Microbiology

As the cat’s offspring continue to suckle, this stimulates the production of more milk from the

mammary glands. This is an example of __________.

a. positive feedback b. negative feedback c. homeostasis d. both negative feedback and homeostasis

Biology & Microbiology

What is the correct sequence of structures through which air passes through on the way into the mammalian lung?

A. larynx ? pharynx ? trachea ? bronchi ? bronchioles ? alveoli B. alveoli ? bronchioles ? bronchi ? trachea ? larynx ? pharynx C. pharynx ? larynx ? trachea ? bronchi ? bronchioles ? alveoli D. pharynx ? trachea ? larynx ? bronchi ? bronchioles ?alveoli E. bronchi ? bronchioles ? pharynx ? larynx ? trachea ? alveoli

Biology & Microbiology

Which of the following is one method in which a change in the DNA leads to genetic changes in a population?

A) genetic drift B) mutation C) founder effect D) bottleneck effect

Biology & Microbiology