How do sphagnum mosses contribute to the carbon cycle? Select all correct choices
A. As decomposers, they release large
amounts of CO2 into the atmosphere.
B. They produce phenols, which release the
carbon stored in peat bogs.
C. As heterotrophs, they remove large
amounts of CO2 from the atmosphere.
D. They produce protons, which limit
decomposition and CO2 production in peat
bogs.
D
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Nitrogen, with an atomic number of 7, has
____ electrons in the first energy level and ____ electrons in the second energy level. a. 1; 6 b. 2; 5 c. 3; 4 d. 4; 3 e. 5; 2
Which example describes biological evolution?
A) You are vaccinated against polio and are protected against the disease. B) A tree branch is broken off and another grows in its place. C) Over time, a caterpillar species becomes as green as the leaves it eats. D) The average woman's dress size has increased over the last 50 years.
Antidiuretic hormone (ADH) and the renin-angiotensin-aldosterone system (the RAAS) work together in maintaining osmoregulatory homeostasis through which of the following ways?
A) ADH regulates the osmolarity of the blood by altering renal reabsorption of water, and the RAAS maintains the osmolarity of the blood by stimulating Na+ and water reabsorption. B) ADH and the RAAS work antagonistically; ADH stimulates water reabsorption during dehydration and the RAAS causes increased excretion of water when it is in excess in body fluids. C) Both stimulate the adrenal gland to secrete aldosterone, which increases both blood volume and pressure via its receptors in the urinary bladder. D) ADH and the RAAS combine at the receptor sites of proximal tubule cells, where reabsorption of essential nutrients takes place.
________ spread more easily in crowded conditions than in places with a sparser population. Thus, these are density-dependent regulating factors
Fill in the blank(s) with correct word