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

Author Question: What happened at the start of the Cambrian Period? A) the first oxygen-producing bacteria ... (Read 51 times)

schs14

  • Hero Member
  • *****
  • Posts: 569
on: Jul 27, 2018
What happened at the start of the Cambrian Period?
 
  A) the first oxygen-producing bacteria appeared
  B) the first dinosaurs appeared
  C) early humans first appeared
  D) an explosion of genetic diversity appeared, leading to the appearance of the first animals

Question 2

The weight of an object on the Moon is what fraction of the weight of the same object on Earth?
 
  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

princessflame2016

  • Sr. Member
  • ****
  • Posts: 298
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

1/6


schs14

  • Member
  • Posts: 569
Reply 2 on: Jul 27, 2018
:D TYSM

nothere

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Olenoides erratus from the Mt. Stephen Trilobite Beds (Middle Cambrian) near Field, British Columbia Olenoides erratus from the Mt. Stephen Trilobite Beds (Middle Cambrian) near Field, British Columbia
Bacteria Bacteria
This label on a Toyota Camry hybrid shows the relative smog-producing emissions, but this does not ... This label on a Toyota Camry hybrid shows the relative smog-producing emissions, but this does not ...
Expanded view of Silicon-oxygen tetrahedron Expanded view of Silicon-oxygen tetrahedron
Producing cDNA from mRNA Producing cDNA from mRNA
Animated Changes in the ovary and uterus correlated with changing hormone levels. We start with the Animated Changes in the ovary and uterus correlated with changing hormone levels. We start with the
Video: Oxygen transport - methods and oxyhemoglobin

For a complete list of videos, visit our video library