What part of the brain acts to control the pituitary, and many other organs separate from the brain?
a. thalamus
b. thyroid
c. pineal
d. hypothalamus
e. adrenal gland
D
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If you were designing a new insecticide absorbed via the respiratory system in arthropods, the killing chemical would enter the invertebrate through the
A. epidermis. B. tracheae. C. alveoli. D. bronchioles. E. gills.
Which statement is characteristic of endocrine glands?
a. They release chemical signals into synapses. b. They produce chemical signals that are always stimulatory. c. They are controlled by only negative feedback mechanisms. d. They secrete chemical signals in small amounts over short periods of time. e. Their activity is limited to brain tissue.
Specific sequences in the ? genome that interact with coat proteins to package genomes into phage particles are known as ________ sites
Fill in the blank(s) with correct word
Homeotic genes of Drosophila:a
cause cells of the same type to produce differing amounts of gene products. b. specifies the developmental plan for each part of each segment. c. are expressed in only one sex in any particular species. d. when mutated, cause body parts to be duplicated. e. control developmental timing.