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
Phantasy [73]
3 years ago
15

What are toenails made of?

Biology
2 answers:
Arlecino [84]3 years ago
7 0

Fingernails and toenails are made out of alpha keratin which is a type of tough, protective protein.

Vinvika [58]3 years ago
6 0

Toe nails are made of keratin

You might be interested in
The key lesson learned by the fact that thalidomide showed no impact when tested on prenatal rabbits but led to birth defects in
drek231 [11]

Answer: Here are the options.

A. Teratogens impact different genotypes differently.b.teratogens impact specific aspects of development.c.teratogen effects may not emerge until later in life.d.teratogen effects are the same regardless of the time when the individual is exposed.

The key lesson is that teratogens impact different genotypes differently or in different ways.

Explanation:

thalidomide is a tetratogen , a substance that will have a physical or functional defect on an embryo after the pregnant mother is exposed to the substance. This disturb the physical development of the child. It became popular to treat morning sickness in pregnancy but was discovered to result in major limb deformities;

Tetratogen impact different genotypes in different ways because different genotypes have different ways they respond to tetratogens because of their level exposure and subscetability. This the main reason thalidomide showed no impact when tested on prenatal rabbits but led to birth defects in prenatal humans. The genotypes of prenatal rabbits are not subscetiple to tetratogens compare to that of the developing embryo on exposure.

3 0
3 years ago
Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate,
Nuetrik [128]
Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate. This a an early reaction in the glycolysis pathway that is a regulatory step in the pathway. An increase int he amount of ATP in the cell might cause decrease in the amount of phosphofructokinase enzyme by a process called feedback inhibition. Glycolysis process is regulated at various steps in which conversion of fructose 6-phosphate to fructose 1,6-bisphosphate is one of the regulatory step.

Answer: In the presence of oxygen, an increase in the amount of ATP in a cell would be expected to INHIBIT THE PHOSPHOFRUCTOKINASE ENZYME AND SLOWS THE RATE OF GLYCOLYSIS.
7 0
3 years ago
Read 2 more answers
List and briefly describe each of the 4 types of evidence that support evolution
tiny-mole [99]

Answer

  • Anatomy Species may share similar physical features because the feature was present in a common ancestor <u><em>(homologous structures)</em></u>.
  • Molecular biology DNA and the genetic code reflect the shared ancestry of life.
  • Biogeography The global distribution of organisms and the unique features of island species reflect evolution and geological change.
  • Fossils Fossils document the existence of now-extinct past species that are related to present-day species.
  • <u><em>Direct observation</em></u> We can directly observe small-scale evolution in organisms with short lifecycles <u><em>(e.g., pesticide-resistant insects)</em></u>.
5 0
2 years ago
What forms when platelets seal a break in the vessel wall?
Allisa [31]

Answer:

A blood clot

Explanation:

It is formed to stop bleeding and foreign bodies from entering the body.

6 0
3 years ago
Which statement best explains the importance of animals to humans?
Ostrovityanka [42]
Animals are used for food, products, and services.
8 0
3 years ago
Read 2 more answers
Other questions:
  • It takes a large number of __________ to support a small number of primary consumer's
    7·1 answer
  • Sister chromatids have the following features EXCEPT that: both parts have telomeres. they are homologs to each other. they rema
    9·1 answer
  • Microbes that normally colonize the mouth must be resistant to
    6·1 answer
  • Is the baggie or beaker more concentrated in starch?
    15·1 answer
  • In humans, male-pattern baldness is controlled by an autosomal gene that occurs in two allelic forms. Allele Hn determines nonba
    11·1 answer
  • Select the correct answer
    15·2 answers
  • What is the atomic number of an element that has 33 protons and 30 neutrons?
    9·1 answer
  • Which statement best dear vibes the relationship between matter and energy during photosynthesis?
    13·1 answer
  • What do the Neuron and Epithelial Cells have in common?
    10·1 answer
  • Which genres are used in the leader in the mirror? check all that apply.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!