« previous next »

Author Question: Which of the following is true of life on Earth? A) Life, in the form of multicellular organisms, ... (Read 87 times)

Redwolflake15

  • Hero Member
  • *****
  • Posts: 569
on: Jul 27, 2018
Which of the following is true of life on Earth?
 
  A) Life, in the form of multicellular organisms, has existed on Earth for only about 2 million years.
  B) Life has existed on Earth for at least 3.4 billion years.
  C) The Cambrian explosion marks the formation of the first unicellular organisms on Earth.
  D) Complex multicellular organisms were present on Earth 2.5 billion years ago.

Question 2

Offspring born with random alterations to their DNA are called__________.
 
  A) clones
  B) drones
  C) mutants
  D) fossils


djpooyouma

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

B

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Redwolflake15

  • Hero Member
  • *****
  • Posts: 569
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


djpooyouma

  • Sr. Member
  • ****
  • Posts: 325
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Water and salt regulation by isosmotic, hyperosmotic, and hypoosmotic aquatic organisms. Water and salt regulation by isosmotic, hyperosmotic, and hypoosmotic aquatic organisms.
True-color image of layers of haze in Titan's atmosphere. True-color image of layers of haze in Titan's atmosphere.
Earth’s Magnetosphere Earth’s Magnetosphere
Identify each stage of the life cycle Identify each stage of the life cycle
Idealized Tidal Bulges on Earth Idealized Tidal Bulges on Earth
Estimates of Heritability for Traits in Different Organisms part 2 Estimates of Heritability for Traits in Different Organisms part 2
Video: Factors that increase metabolic rate and heat production

For a complete list of videos, visit our video library