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
AleksandrR [38]
3 years ago
14

20. Why are scientific theories changed but never thrown away?

Biology
1 answer:
Elis [28]3 years ago
7 0

Scientific Theory change but not thrown away because scientist continue looking for possibilities and exact proportion to prove such theory, though it is change because they always conducted hypnosis in every theory and once it proves something different they conduct another hypothesis for more actual evidence.

You might be interested in
What are the five categories that help answer the question, "Why is biodiversity important?"
postnew [5]
1. Protection of water resources.
2. Soils formation and protection.
3. Nutrient storage and recycling.
4. Pollution breakdown and absorption.
5. Contribution to climate stability.
3 0
3 years ago
True or False: Skeletal muscles are found in the heart
Zigmanuir [339]
True they are in the heart as well as the rest of your body
6 0
3 years ago
Help me plss, I will brainliest
Sophie [7]

Answer:

intrusive igneous rocks cool from magma slowly because they are BURIED beneath the surface extrusive igneous rocks cool from lava rapidly because they form at the surface and the meaning of those words are simple intrusive means inside of something like interior and extrusive means outside which is like exterior

7 0
3 years ago
During replication, nucleotide bases are added to DNA strands in a ___ direction(s).
Alborosie

Nucleotide bases are added to DNA strands in a 5' to 3' direction.

What is DNA replication?

When a cell divides, DNA copies itself through a process called replication.

  • Generally speaking, DNA replication involves uncoiling the helix, strand separation by rupturing the hydrogen bonds between the complementary strands, and synthesis of two new strands through complimentary base pairing.
  • The origin of replication, which is a precise location in the DNA, is where replication starts.
  • From the point of origin, DNA replication is bidirectional.
  • The two parent DNA strands unwind and split apart at the origin of replication to generate two "Y-shaped" replication forks in order to start DNA replication.
  • These unwinding enzymes are known as DNA helicases.
  • The real location of DNA copying is at these replication forks.
  • Proteins that destabilize helices bind to the single-stranded areas to prevent the two strands from rejoining.
  • To reduce stress on the helical molecule during replication, enzymes known as topoisomerases cause breaks in the DNA and then reunite them.
  • The hydrogen bonding of free DNA nucleotides with those on each parent strand results in the formation of new complementary strands as the strands continue to unwind and split in both directions around the entire DNA molecule.
  • The new nucleotides are joined by DNA polymerases using phosphodiester bonds as they align themselves opposite each parent strand using hydrogen bonds.
  • Deoxynucleotide triphosphates, which are made up of a nitrogenous base called deoxyribose and three phosphates, are the actual nucleotides that are aligning through complementary base pairing.
  • Two of the phosphates are withdrawn to provide energy for bonding as the phosphodiester bond forms between the 3' OH of the previous nucleotide in the DNA strand and the 5' phosphate group of the next nucleotide.
  • In the end, two identical DNA molecules are created when each parent strand acts as a template for the synthesis of a complementary copy of itself.

Hence, nucleotide bases are added to DNA strands in a 5' to 3' direction.

To learn more about DNA replication click on the link

brainly.com/question/21265857

#SPJ1

3 0
1 year ago
Viruses have all of the characteristics of living things except
Nezavi [6.7K]

Answer: I think its cells

Explanation:

Viruses dont have cells

6 0
2 years ago
Read 2 more answers
Other questions:
  • Which is usually the best way to present or communicate inferred data
    12·1 answer
  • Which characteristic is not associated with b lymphocytes?
    12·1 answer
  • "interpret the diagram"
    5·1 answer
  • Witch sentence most likely explains why the rock has large open pores
    15·1 answer
  • A(n) _____ specimen is the most concentrated urine.
    8·1 answer
  • A review of the cladogram shows a common ancestor for these four types of vertebrates. Which statement BEST explains the genetic
    10·1 answer
  • List the genotypes of a homozygous tall pea plant and a heterozygous tall pea plant, assuming that the dominant allele is T and
    14·1 answer
  • Water is a term used to describe that is safe to drink
    11·2 answers
  • What re stomata?how do they help leaves tomae food.<br> love you all
    8·1 answer
  • Plz help me I will mark as brainlest and follow u plz help I need a long answer
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!