1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Phoenix [80]
3 years ago
13

How long were simple microsocpic organisms the only life forms on earth?

Biology
1 answer:
charle [14.2K]3 years ago
8 0
The simple microscopic organisms the only life forms on earth was 560 million years.
You might be interested in
Uncle Billy likes to drink alcohol, smoke cigarettes, and eat in a lot of fast food restaurants (McDonalds, Wendys, Pizza, etc).
77julia77 [94]

Answer: Eating a diet high in saturated fats, trans fats, and cholesterol has been linked to heart disease and related conditions, such as atherosclerosis. Also too much salt (sodium) in the diet can raise blood pressure. Not getting enough physical activity can lead to heart disease.

Explanation: Diet is an important risk factor in coronary heart disease. Heavy drinking may well increase heart attack, heart failure, stroke, and high blood pressure. A limit for men is 2 drinks a day, for women 1 drink a day.

7 0
2 years ago
Buying local produce is healthier for you and the environment. <br><br>true or false​
Rina8888 [55]

Answer:

<h2>False...................</h2>
3 0
2 years ago
Read 2 more answers
Which of the following statements is correct regarding engineering maize plants with a herbicide-resistance gene using Agrobacte
Mariulka [41]

Answer:

b. The herbicide-resistance gene is cloned into the T-DNA region of the Ti-plasmid.

Explanation:

Ti-plasmid has the ability to introduce part of its DNA (t-DNA) into the genome of host plants. This is very important for the relationship of genetic manipulation in maize plants, with the aim of inducing a gene that promotes herbicide resistance. In addition, T-DNA has many genes that code for the production of plant growth phytohormones, which is extremely important for the cloning process to work. In this case, we can assume that the correct answer for yours is the letter B.

6 0
3 years ago
What if DNA was parellel ?
cupoosta [38]
In biochemistry, two biopolymers are antiparallel if<span> they run </span>parallel<span> to each other but with opposite alignments. An example is the two complementary strands of a </span>DNA<span>double helix, which run in opposite directions alongside each other.</span>
5 0
3 years ago
What is active transport​
Bumek [7]

Answer: the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.

Explanation:

Requires energy input from a cell and enables A cell to move a substance against its concentration gradient

8 0
3 years ago
Read 2 more answers
Other questions:
  • 1. How is DNA replicated?
    12·1 answer
  • How are animal and plant cells similar? How are they different? Explain.
    12·2 answers
  • Which selection is a characteristic of both living and non-living things? A)They both use and obtain energy. B)The same atoms an
    10·2 answers
  • Jake designed an experiment to demonstrate interactions between Earth systems. He tied a clear plastic bag firmly around some le
    8·2 answers
  • What adaptation most likely helps this bird fly?
    8·2 answers
  • (H2PO4)- is a base. Which is its conjugate acid?<br>H2PO4-​
    5·1 answer
  • which of these is an environmental effect of farming A. soil erosion B. tempature increase C. natural disasters D. habitat succe
    13·2 answers
  • Most biologists consider the most intelligent invertebrate animal to be a
    12·1 answer
  • What are five decomposers that are found in or around Pride Rock in the movie Lion King
    6·1 answer
  • Which of the following is a possible source of water pollution?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!