This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: How long ago did multicellular life forms appear in the fossil record? A) 4.5 billion years ago ... (Read 65 times)

yoroshambo

  • Hero Member
  • *****
  • Posts: 566
on: Jul 27, 2018
How long ago did multicellular life forms appear in the fossil record?
 
  A) 4.5 billion years ago
  B) 3.8 billion years ago
  C) one billion years ago
  D) 63 million years ago
  E) 30 million years ago

Question 2

Relate Herbig-Haro objects to the T-Tauri Wind.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

djpooyouma

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

In stage 5, the spinning protostar forms a dusty disk, but ejects material at high speeds along the bi-polar jets perpendicular to this disk. The shock wave from these high speed jets lights up the Herbig-Haro objects along a line over a light-year long in some cases.


yoroshambo

  • Hero Member
  • *****
  • Posts: 566
Reply #2 on: Jul 27, 2018
Thank you!


djpooyouma

  • Sr. Member
  • ****
  • Posts: 325
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

The FDA recognizes 118 routes of administration.

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
Martin Van Buren, sitting uncomfortably for this engraving, would eventually ascend to the presidenc Martin Van Buren, sitting uncomfortably for this engraving, would eventually ascend to the presidenc
The demand for energy is met by burning coal and other fossil fuels The demand for energy is met by burning coal and other fossil fuels
The life cycle of Chlamydomonas The life cycle of Chlamydomonas
Life cycle of a moss (Polytrichum) Life cycle of a moss (Polytrichum)
Nils Hoffmann feat. Dustin Tebbutt - Next Life Nils Hoffmann feat. Dustin Tebbutt - Next Life
Video: Monohybrid crosses

For a complete list of videos, visit our video library