« previous next »

Author Question: Researchers are able to directly measure the rate of productivity in experiments using a ... (Read 53 times)

lracut11

  • Hero Member
  • *****
  • Posts: 536
on: Aug 22, 2018

Researchers are able to directly measure the rate of productivity in experiments using a radioactively tagged atom.
  Which isotope is commonly used?
  a. carbon-12
  b. carbon-13
  c. carbon-14
  d. nitrogen-14
  e. nitrogen-15



Question 2

During times of high productivity which plankton are notable for making the surface water appear milky or chalky?
  a. coccolithophores
  b. dinoflagellates
  c. zooplankton
  d. cyanobacteria
  e. diatoms



tanna.moeller

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Aug 22, 2018
Answer to Question 1

c

Answer to Question 2

a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Thyroid conditions may make getting pregnant impossible.

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.

Scale used to measure pupil size in millimeters. Scale used to measure pupil size in millimeters.
A Glitch Interrupts the Vela Pulsar’s Spindown Rate A Glitch Interrupts the Vela Pulsar’s Spindown Rate
William Masters and Virginia Johnson are among the most influential researchers in the history of th William Masters and Virginia Johnson are among the most influential researchers in the history of th
Using a goniometer to measure joint ROM. Using a goniometer to measure joint ROM.
Productivity in Selected Industries in the Early 1990s Productivity in Selected Industries in the Early 1990s
Cost = $99.49; Rate of markup based on cost = 32%. Find the markup and selling price. Cost = $99.49; Rate of markup based on cost = 32%. Find the markup and selling price.
Video: Coaductile pathway, Timing of contraction signal & Conduction system and ECG

For a complete list of videos, visit our video library