When calcium levels in the blood are low, the ________ produces ________, which stimulates the breakdown of bone, releasing calcium.

A. pancreas; glucagon
B. adrenal glands; norepinephrine
C. pituitary gland; growth hormone
D. parathyroid gland; parathyroid hormone
E. adrenal glands; aldosterone


Answer: D

Biology & Microbiology

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A new plant species is introduced to Daphne Major and produces small, thin seeds. This plant species is highly adapted to drought and after 5 years has replaced over 80% of the native plants that produce large seeds. How will this change affect the evolution of beak size in the medium ground finch population?  

A.  Small beaks will be favored under all rainfall conditions. B.  Small beaks will be favored in wet years and large beaks will be favored in dry years. C.  Large beaks will be favored in wet years and small beaks will be favored in dry years. D.  Large beaks will be favored under all rainfall conditions.

Biology & Microbiology

____ is the proportion of individuals of an initial cohort that survives to each successive age or stage of the lifecycle

Fill in the blank with the appropriate word.

Biology & Microbiology

Darwin was probably influenced most by which of the following when developing his theory of

evolution?

a. Scala Naturea b. Catastrophism c. Uniformitarianism d. Taxonomy e. Vestigial structures

Biology & Microbiology

A cell becomes arrested within the cell cycle because it is unable to replicate its DNA. In which stage would you predict the cell would become arrested?

A) Gap 1 phase B) Gap 2 phase C) mitotic phase D) S (DNA synthesis) phase E) telophase

Biology & Microbiology