« previous next »

Author Question: People have long speculated about whether life exists on Mars. Scientists have e (Read 1668 times)

Mr. Wonderful

  • Hero Member
  • *****
  • Posts: 866
on: Apr 23, 2014
People have long speculated about whether life exists on Mars. Scientists have evidence that on Mars, ______.
A) microbial life exists
B) liquid water has existed in the past
C) the only water present has always been frozen in the polar ice caps
D) water is found only in the form of water vapor


ghost!

  • Hero Member
  • *****
  • Posts: 560
Reply #1 on: Apr 29, 2014
B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Mr. Wonderful

  • Hero Member
  • *****
  • Posts: 866
Reply #2 on: Apr 29, 2014
Wow, thanks!


« previous next »
 

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

A herd of barren-ground caribou at the Thelon River. This subspecies is a long-distance migrant A herd of barren-ground caribou at the Thelon River. This subspecies is a long-distance migrant
Mars Avalanche Hirise Mars Avalanche Hirise
Life cycle of Plasmodium vivax Life cycle of Plasmodium vivax
Hormones acting through the brain help regulate metabolism and short- and long-term appetite. Hormones acting through the brain help regulate metabolism and short- and long-term appetite.
These findings are from Colby and Kohlberg's long-term longitudinal study These findings are from Colby and Kohlberg's long-term longitudinal study
Long noncoding RNAs mediate transcriptional activation Long noncoding RNAs mediate transcriptional activation
Video: Appendicitis Animation

For a complete list of videos, visit our video library