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

Author Question: What period of Earth's geologic history saw a dramatic increase in life? a. Cretaceous b. ... (Read 92 times)

crobinson2013

  • Hero Member
  • *****
  • Posts: 535
on: Jul 27, 2018
What period of Earth's geologic history saw a dramatic increase in life?
 
  a. Cretaceous
  b. Devonian
 c. Jurassic
 d. Tertiary
 e. Cambrian

Question 2

Which describes the direct change in genetic information of a cell?
 
  a. chromosome
 b. mutation
 c. evolution
 d. natural selection
  e. heredity


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jaygar71

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

b


crobinson2013

  • Member
  • Posts: 535
Reply 2 on: Jul 27, 2018
Wow, this really help

xiazhe

  • Member
  • Posts: 331
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Life of a Medical School Student Life of a Medical School Student
Earth as viewed from Lunar orbit during the Apollo 8 mission, Christmas Eve, 1968. Africa is at the Earth as viewed from Lunar orbit during the Apollo 8 mission, Christmas Eve, 1968. Africa is at the
Earth and the Moon Earth and the Moon
U.S. Life Expectancy by Year of Birth U.S. Life Expectancy by Year of Birth
Earth’s Revolution and Rotation Earth’s Revolution and Rotation
Life cycle of Giardia. Life cycle of Giardia.
Video: Interview with Person who has Schizophrenia

For a complete list of videos, visit our video library