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
dmitriy555 [2]
3 years ago
6

4. A scientist finds a rock with old microfossils in it, likely from around 4 billion years ago. Which

Biology
1 answer:
nignag [31]3 years ago
7 0

Answer:

U-238

Explanation:

the half-life of uranium-238 is about 4.5 billion years

You might be interested in
Please?!<br> How many strands do RNA have?
Rufina [12.5K]

Answer:

One

Explanation:

RNA is a single-stranded molecule

8 0
3 years ago
Read 2 more answers
Raya conducts an experiment to study the effect of altitude on the growth of plants she gathered plant samples and places them o
aniked [119]

Answer:

Independent variable: ALTITUDE

dependent variable: GROWTH OF PLANTS

Confounding variable: STOREYS OF THE BUILDING

Explanation:

In an experiment, the basic components i.e primary variables that an experiment should contain, are the independent and dependent variables.

- The independent variable is the variable that is changed or manipulated in an experiment. In this experiment, the ALTITUDE of the plant is the independent variable.

- The dependent variable is the variable that responds to changes to the independent variable. It is the variable measured in an experiment. In this case, the dependent variable is the GROWTH OF THE PLANTS.

- The confounding variable is a variable that has an extra influence on the outcome of the experiment. In other words, the confounding variable has an impact on the dependent variable. In this case, the confounding variable is the STOREYS OF THE BUILDING.

3 0
3 years ago
Why does a closed terrarium constantly need light?
IRINA_888 [86]
 The sunlight provides energy for the plants to grow. <span>Since it is a closed system, no water would be lost, so it is not necessary to add extra water. </span>
8 0
4 years ago
Some students were studying antibodies in the body. In determining their composition, they were told they are polypeptides forme
vlabodo [156]

Answer:

They concluded that these antibodies were a) Globular proteins

Explanation:

Globular proteins are known to be water-soluble, spherical in shape and to be polypeptides as well. Compared to the other options provided, the selected one is the most correct.

3 0
3 years ago
Which option is an example of a physical property?
wariber [46]
Rusting ability because it is something you can see
4 0
3 years ago
Read 2 more answers
Other questions:
  • Need help with biology homework
    10·1 answer
  • Consider that DNA is read as triplets as proteins are built. Which mutation types might have the biggest effect on protein struc
    10·1 answer
  • What is the electrical current passing through this ammeter?1
    7·1 answer
  • What is the structure that functions as the main food producer for the survival of the plant
    13·1 answer
  • Describe three features of a tropical rainforest​
    14·1 answer
  • 3. A car slams on its brakes, producing friction between the tires and the road. Into which type of energy is the mechanical ene
    11·2 answers
  • What fibers are used in the manufacturing of rayon?
    7·1 answer
  • Help plzzzz
    8·1 answer
  • 40 POINTS AND BRAINLY IF CORRECT
    11·2 answers
  • Identify a disease or disorder and explain how it might be controlled by genetic engineering.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!