« previous next »

Author Question: What do researchers use to directly measure the rate of productivity? a. Carbon-12 b. Biomass c. ... (Read 26 times)

swpotter12

  • Hero Member
  • *****
  • Posts: 527
on: Aug 22, 2018

What do researchers use to directly measure the rate of productivity?
  a. Carbon-12
  b. Biomass
  c. Carbon-14
  d. Chloroplasts



Question 2

A highly biological productive ocean surface appears chalky; what plankton is likely successful here?
  a. Diatoms
  b. Dinoflagellates
  c. Coccolithophores
  d. Isopods



leahchrapun

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Aug 22, 2018
Answer to Question 1

ANS: C
Scientists tag carbon by radioactivity. The c-14 behaves the same way normal c-12 does, but it can
easily be tracked through photosynthesis. Information can be found in the section Measuring Primary
Productivity.



Answer to Question 2

ANS: C
Coccolithophores are able to utilize brightly lit ocean surfaces like the Mediterranean. Their numbers
can bloom, making the water appear chalky or milky. These plankton are capable of building seabed
deposits of ooze, like that at the White Cliffs of Dover in England. Information can be found in the
section Most Phytoplankton are Photosynthetic Autotrophs.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

swpotter12

  • Hero Member
  • *****
  • Posts: 527
Reply #2 on: Aug 22, 2018
Both answers were spot on, thank you once again


leahchrapun

  • Sr. Member
  • ****
  • Posts: 332
Reply #3 on: Aug 22, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Variation in the rate of evolution as a function of the strength of selection, assuming genetic drif Variation in the rate of evolution as a function of the strength of selection, assuming genetic drif
Using a sphygmomanometer to measure blood pressure. Using a sphygmomanometer to measure blood pressure.
Using a goniometer to measure joint ROM. Using a goniometer to measure joint ROM.
Human activity has released carbon from sequestration in long-term reservoirs Human activity has released carbon from sequestration in long-term reservoirs
Target Heart Rate Target Heart Rate
Data Used to Analyze Productivity in Country 1 and Country 2 Data Used to Analyze Productivity in Country 1 and Country 2
Video: TRH/TSH/Thyroid hormone

For a complete list of videos, visit our video library