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
Musya8 [376]
3 years ago
15

How long has there been life on earth

Biology
1 answer:
babymother [125]3 years ago
6 0

They said that 4.5 billion years


I hope that's help :)

You might be interested in
Someome who studies ocean currents is called
Masteriza [31]
<span> They are called an oceanographer</span>
7 0
3 years ago
Read 2 more answers
Stem cells begin to transform into different types of cells in the human body in a process known as cell
Lena [83]
Stem cells begin to transfor into different types of cells in the human body in a process known as cell differentiation.

Cellular differentiation occurs throughout the cell development of a multi-cellular organism. It occurs when the cell changes from a simply zygote into a complex system of tissues and cell types.

Stems cells are cells which have the potential to develop into many different cell types in the body during early life and growth. Stem cells serve as internal repair system in many tissues. When stem cells divide while undergoing cell differentiation, it can either retain being a stem cell or become another type of cell like muscle cell, brain cell, or red blood cell.


7 0
3 years ago
Read 2 more answers
The female part of the plant is called the <br> A. stamen<br><br> B. pistil
snow_lady [41]

Answer:

B

Explanation:

8 0
3 years ago
Read 2 more answers
Which of Mars's moons is most likely to either break apart or crash into the planet in
algol [13]

Answer:

Phobos

Phobos is nearing Mars at a rate of six feet (1.8 meters) every hundred years; at that rate, it will either crash into Mars in 50 million years or break up into a ring.

Explanation:

5 0
3 years ago
Which of these government programs encourage hygiene practices?
Ludmilka [50]

Answer;

B. Water purification programs

Explanation;

The goal of hygiene promotion is to help people to understand and develop good hygiene practices, so as to prevent disease and promote positive attitudes towards cleanliness.

Hygiene promotion encompasses a systematic attempt to adequately promote personal, domestic, environmental and food hygiene practices that prevent or mitigate the transmission of diseases. Water purification programs is among the government programs that encourages hygiene practices.

5 0
3 years ago
Read 2 more answers
Other questions:
  • What kind of pattern do you notice with the structure of DNA? For example, what pattern do you see with the rails and rungs of t
    5·2 answers
  • Explain how the process of meiosis relates to the way in which a child resembles but is not a copy of his or her exact parents
    12·1 answer
  • An animal cell (left) and a plant cell (right) are shown. Which organelle, labeled X in the diagram, is found in both plant and
    16·2 answers
  • A student conducts an experiment to determine how the amount of water given to a plant affects its growth.
    9·2 answers
  • The population in South Africa is more prone to sickle cell anemia (genotype “ss”). People with genotype “ss” survive only up to
    10·1 answer
  • How does the life cycle of a praying mantis differ from the life cycle of a beetle?
    7·1 answer
  • The physical characteristics of an organism that result from its genes are referred to as its
    15·1 answer
  • Help me fill me fill in the blanks please???
    7·1 answer
  • Solar tracking, or _____, is a plant's growth toward light.
    10·1 answer
  • What role do plants play in the water cycle within an ecosystem? How would the ecosystem change if many of the plants were remov
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!