This topic contains a solution. Click here to go to the answer

Author Question: After reading the paragraph below, answer the questions that follow.In 2011, scientists investigated ... (Read 43 times)

melina_rosy

  • Hero Member
  • *****
  • Posts: 531
After reading the paragraph below, answer the questions that follow.

In 2011, scientists investigated whether the salts that are spread on icy roads to melt the ice are diluted enough by spring rainfall so that they do not have negative effects on amphibian species that breed in nearby areas. They exposed clutches (groups of eggs) of salamanders to three test conditions with varying salt concentrations (road salts mixed with dechlorinated tap water) to simulate salt concentrations of small pools of water located near highways that are typically fed by rain—areas where salamanders often lay their eggs. After 9 days, the scientists placed the three groups in "normal" water and measured how much body mass the salamanders lost every 3 days for 9 days. They chose to measure change in mass because salamanders are able to take in water, which helps lower the chances of salamander embryos dying from freezing, disease, or predation. The table below provides partial results of this study.

GroupChloride Concentration in Test ConditionsTotal % Mass Lost after 9 Days of Exposure to Test ConditionsTotal % Mass Regained after 9 Days in Normal Water ConditionsAdditional % Mass Lost after 9 Days in Normal Water Conditions
1145 mg/L20%15%0%
2945 mg/L35%0%10%

There was a third group (group 3) in this study that experienced the same test conditions as groups 1 and 2 except that the water to which group 3 was exposed always had a chloride concentration (mg/L) that salamander clutches would normally experience (that is, with no road salts in the water). What do you predict that group 3 demonstrated?
◦ the highest mass loss of all groups
◦ higher mass lost from its initial conditions than group 2
◦ the same mass lost from its initial conditions as group 1
◦ no mass lost from its initial conditions


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by melina_rosy on Jul 15, 2019

cici

  • Sr. Member
  • ****
  • Posts: 325
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly




melina_rosy

  • Member
  • Posts: 531
Reply 2 on: Jul 15, 2019
Great answer, keep it coming :)


meganmoser117

  • Member
  • Posts: 303
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

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?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

For a complete list of videos, visit our video library