While walking along a trail in the woods you notice that your dog walks over to a tree and urinates on the base of the largest tree on the trail. Your dog's behavior is an example of


Select one:
a. visual communication.
b. auditory communication.
c. tactile communication.
d. chemical communication.
e. learning.


d. chemical communication.

Biology & Microbiology

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Why do vertebrates have more individual Hox genes than most invertebrates, and what is the general significance?

What will be an ideal response?

Biology & Microbiology

The molecule shown above is testosterone, a substance that has important regulatory functions in

humans and many other animals. Molecules with regulatory functions like testosterone are called ____.

a. phytosterols b. enzymes c. lipoproteins d. hormones e. receptors

Biology & Microbiology

Which of the following is NOT a characteristic

of type 2 diabetes?

a. pancreatic islet cells are destroyed b. onset of symptoms typically begins in middle age c. obesity is a big risk factor d. diet and exercise can help control it e. all of these are characteristics of type 2 diabetes

Biology & Microbiology

Cytokinins are water-soluble hormones produced in the root apical meristem and stimulate the growth of lateral buds. How do cytokinins reach the lateral buds?

A. by diffusion as a gas B. through the phloem C. through the xylem D. through the phloem and xylem E. through the phloem and by diffusion as a gas

Biology & Microbiology