Which of the following involves only biotic factors?

A. a pine tree absorbing light from the Sun

B. a spider building a web in the corner of a building

C. a duck catching and eating a snail

D. an otter using a stone to break open a sea urchin

Name a land animal that is sessile. Why would this adaptation be a disadvantage to an animal in a land biome?

An excessive amount of blood in a body part due to decreased venous drainage is

Assume that trees are subjected to different levels of carbon dioxide atmosphere with 6% of the trees in a minimal growth condition at 350 parts per million (ppm), 12% at 440 ppm (slow growth), 49% at 570 ppm (moderate growth), and 33% at 630 ppm

What geologic event most likely caused the folding and faulting of these layers?

Describe filtrate formation from browman's capsule to excretion.

8. Cystic fibrosis is caused by a recessive allele. The frequency of this allele is 0.1 in a population of 2,500. a. What is the frequency of the dominant allele? b. How many people in this population will have cystic fibrosis? c.

Which part of the brain controls conscious activities, memory, language and the sense?

Which intestinal disorder is characterized by the colon overresponding to normal stimuli, which causes alternating patterns of constipation and diarrhea?

The gene has a frameshift mutation, where the fifth sequence in the base is deleted. write the new DNA base sequence

Sexual reproduction involves the processes listed below. which sequence represents the order in. which these processes occur