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The thermoneutral zone refers to the range of temperatures where a homeotherm's resting metabolic rate: A. is relatively constant B.is elevated because the ambient temperature is below the lower critical temperature C. is elevated because the ambient temperature is above the upper critical temperature D. declines because the ambient temperature is above the upper critical temperature

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Reid Wolff
Reid WolffLv2
28 Sep 2019

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Related questions

Which of the following is true of the thermal neutral zone?

a. For any animal, this is a set temperature at which heat production is precisely matched by heat loss
b. This is the whole range of temperatures at which the animal can survive
c. This is the range of temperatures at which 50% of the animals survive
d. This is a temperature range over which passive thermal control mechanisms are used to maintain a stable body temperature.
e. This is a temperature range over which active thermal control mechanisms
are used to maintain a stable body temperature.

Alice wants to test how warmer temperatures that occur over onenight can affect pollen germination in the Nicotianatabacum plant. She knows that the plant prefers 20–30 °C(68–86 °F). She sets up an experiment where her plants are storedin an incubator with regulated temperature: the incubator is keptat 20–30 °C (68–86 °F) during the day and increases to 35-40 °C(95-104°F) at night. She will leave the plants in the incubator for24 hours. Alice hypothesizes that plants exposed to warmertemperature for a night will have increased germination.

A) What is her positive control?

-Nicotiana tabacum plant left at 20-30 °C

-Aloe maculata plant left at 20-30 °C

-Nicotiana tabacum plant left at 35-40 °C

-Aloe maculata plant left at 35-40 °C

B) What is her independent variable?

-The temperature of the incubator

-Nicotiana tabacum plant

-Percent germination

-Elongation rate

C) What is her dependent variable?

-Percent germination

-Initiation time

-If the pollen germinates

-The temperature of the incubator

D) What is her ideal negative control?

-A temperature that prevents Nicotiana tabacum pollen growth

-A temperature that prevents Aloe maculata pollen growth

-Immature Nicotiana tabacum pollen

-Nicotiana tabacum pollen in cedar oil

Match each important characteristic or process of Titan'satmosphere with the gas(es) and/or mechanism(s) that are thought tobe responsible.

A. Titan experiences clouds, rainfall, evaporation, and ice -the three phases of methane - as on Earth we experience the threephases of water, due to...

B. Atmospheric methane lost to photodissociation and otherchemical reactions must be replaced from...

C. Nitrogen, N2, is the dominant gas. The nitrogen comesfrom...

D. The temperature profile with altitude includes an inversionproducing a stratosphere, as on Earth (and no other planets). Thesource of heat in the upper atmosphere is...

E. An orange "tholin haze" colors the lower atmosphere. The hazeis due to...

F. Hydrogen is produced by photodissociation of methane but isnot observed in the atmosphere because of...


Micron-sized particles of hydrocarbons and other organicmolecules, formed via photochemical reactions in the upperatmosphere.

Dissociation of ammonia, NH3, incorporated in Titan at itsformation.

Absorption of sunlight by methane, CH4, in the upperatmosphere.

The surface temperature and pressure of Titan being close to thetriple point of methane.

Evaporation of methane from surface lakes on short timescales,and release from Titan's interior via volcanic processes ongeological timescales.

Thermal escape processes, with light gases moving so quicklythey escape Titan's weak gravity.

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