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
jek_recluse [69]
3 years ago
8

Which is not one of darwin's four main ideas of natural selection?

Biology
1 answer:
tiny-mole [99]3 years ago
4 0
The answer is letter A. evolution always improves organisms. Darwin did not state this idea because he observed that even if evolution happened to species, there were some species that failed to adopt on the new environment. The other choices are his ideas of natural selection which states that an organism can survive if it has heritable traits that can adopt with the environment.
You might be interested in
1. Explain why neither cyclins not kinases alone can cause a cell to progress along in the cell cycle.
Degger [83]
1. Explain why neither cyclins nor kinases alone can cause a cell to progress through the cell cycle.

As cyclin accumulates, it activates their kinases that turn on the pathway to mitotic spindle formation, and so on.

2. How do controls of the cell cycle protect multi-cellular organisms from accumulating large numbers of damaged or defective cells?

The checkpoint control is responsible for multi-cellular organisms for not accumulating large numbers of damaged or defective cells. Checkpoint controls consist of proteins that detect mistakes and damage and quickly halt the cell cycle until repairs are made. When this occurs, the cell is said to be in cell-cycle <span>arrest.

</span>3. What is the difference between a cancerous tumor and metastasis?
Cancer is cause by mutations in the genes that encode these proteins can lead to uncontrolled growth. Cancer is when there is uncontrolled cell growth and reproduction. Metastasis is caused by tumors when they grow and interfere with the surrounding tissue or cells and break off and spread around the body. Cancerous tumors cause metastasis, and tumors are caused by mutations in genes that lead to uncontrolled growth.
4. What are the functions of tumor-suppressor genes and protoncogenes in noncancerous cells?
The genes that encode the checkpoint proteins are called tumor suppressors because they suppress the development of cells into tumors. If mutations inactivate these genes, the cell-cycle break is removed with or without a signal from the outside. Proto-oncogene’s are involved in promoting cell division, mutations can cause them to become oncogenes, or cancer genes which stimulate cells to leave G0 and divide whether or not it is a signal.
6 0
3 years ago
Describe how anemia and leukemia affect the blood.
Vaselesa [24]
Anemia- The Bone Marrow stops making red and white cells and platelets for the body.

People with severe or very severe are in risk of life threathing infections and bleeding.

Leukemia- Is a cancer to blood or bone marrow .Large numbers of white cells are produced in the bone marrow and crowd it and the bloodstream and they cannot perform the proper role of protecting and fitting against diseases.Blood has to go everywhere to bring to body what it needs, making it a stuff cancer.

Major progress and been made targeting this cancer, take the blood out of the body, separate your cancer blood from your good blood, better ways to kill only the bad blood, make more good blood faster, relax your body, mind, improved immune system.
8 0
3 years ago
These characteristics, or adaptations, are
kkurt [141]

A) ability to learn or acquire the new traits

Explanation:

It's the process that species go through in order to become accustomed to an environment.

4 0
3 years ago
Which best describes the process of editing a conclusion?
dedylja [7]
Brainstorm, draft, reread, revise, edit, final draft.
Conclusions should have a hook, bridge, and call to action and/or summary.
3 0
3 years ago
How will the filtration rate in the renal corpuscles be affected if a kidney stone creates a blockage of the urinary tract?
Leviafan [203]

Answer:

There will be a progressive fall in glomerular filtration rate.

Explanation:

The glomerular filtration rate,GFR, shows how well the Kidney is functioning or working. When the Kidney is not working well, it doesn't filter the way it should.

Note that, Glomerular filtration is the process of removing wastes and excess fluid to become part of the urine, by the kidney.

7 0
3 years ago
Other questions:
  • How are genes being turned into private property?
    12·1 answer
  • What is a meristematic cell?
    11·1 answer
  • Which factors can prevent permanent fixation of an allele (i.e. maintain genetic diversity)? Hint: You're going to have to try d
    12·1 answer
  • What biome is the aloe best adapted for
    7·2 answers
  • Explain the functions of the spinal cord.
    8·2 answers
  • How do traits occur in organisms?
    5·1 answer
  • what is the biological definition of a species? a.a group of organisms that look alike b.a group of similar organisms that live
    6·2 answers
  • What are the reactants in this chemical reaction
    10·1 answer
  • HELP!! PLEASE!!! 10 POINTS
    13·1 answer
  • This is a map of Yosemite national park. look for areas on the map that could be prone to mass movements. In which area could a
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!