Author Question: Why is the claim of the discovery of microfossils controversial? A) they are found in rocks from ... (Read 223 times)

ARLKQ

  • Hero Member
  • *****
  • Posts: 571
Why is the claim of the discovery of microfossils controversial?
 
  A) they are found in rocks from the Hadean Eon
  B) it is not clear whether they are of biological or mineral origin
  C) the rocks they are found in are probably contaminated by terrestrial bacteria
  D) they are too small to be of biological origin

Question 2

The idea of dark matter arose to explain gravitational effects observed in galaxies and clusters of galaxies.
 
  However, studies of the early universe (especially of the cosmic microwave background and of chemical abundances) also tell us something about dark matter. What do they tell us? A) They add further support to the idea that dark matter really exists and is made of non-ordinary (nonbaryonic) matter, such as WIMPs.
  B) They do not support the conclusion that dark matter is the dominant form of matter in the universe.
  C) They tell us that dark matter probably exists, but that it must be made of ordinary (baryonic) matter in the form of MACHOs.
  D) They tell us that dark matter was produced during the era of nuclei.



Zack0mack0101@yahoo.com

  • Sr. Member
  • ****
  • Posts: 341
Answer to Question 1

B

Answer to Question 2

A



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

For a complete list of videos, visit our video library