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
rosijanka [135]
3 years ago
6

Which statements describe dichotomous keys? Check all that apply.

Biology
1 answer:
miskamm [114]3 years ago
7 0

Answer:

1,3,4

A dichotomous key uses questions or statements to help identify organisms, it also uses characteristics in it's questions ( that may be yes-no) and statements to help separate organisms from one another.

Hope this helped and plz mark as brainliest!

Explanation:

You might be interested in
Bundles of axons in the central nervous system are called
Karolina [17]

Answer: Bundles of axons in the central nervous system are called a "tract"

Explanation:

Axons(nerve fiber) consist of long slender projection of neurons or nerve cells that conduct and transmit impulses away from the neuron or nerve cell body. Axons are surrounded by endoneurium layer which contain protein fluid that surround each axon.

Bundles of axon in the CNS is known as tract. We have ascending tracts and descending tracts. The ascending tracts function are to conduct and carry impulses along the spinal cord to the brain while the descending tracts transmit and carry the impulses from the brain to lower regions (downward) of the body. Tracts are identified by their origin (where the bundle start) and also the end/termination of axon bundle.

The largest tracts are fasciculi gracilis and cuneatus which are known as ascending tracts.

7 0
3 years ago
Why are fungi unable to live in dry areas?
mezya [45]
They can’t live in dry areas because fungi need to be able to trap moisture since their broad tops can dry out
3 0
3 years ago
Read 2 more answers
Explain the thermal properties of water
Zinaida [17]

Answer:

A glance of earth taken from space will depict it blue. This blue colour is actually water, the major part of the earth is covered with water. We need water for almost everything, for example- drinking, bathing, cooking etc and therefore we should know about the properties of water. 65 % human body is composed of water. Water is essential for the survival of life on earth. Water is distributed unevenly on the earth’s surface. It forms a major solvent and dissolves almost every polar solute. So let us have a look at its properties.

Physical properties of water : Water is a colourless and tasteless liquid. The molecules of water have extensive hydrogen bonds resulting in unusual properties in the condensed form. This also leads to high melting and boiling points. As compared to other liquids, water has a higher specific heat, thermal conductivity, surface tension, dipole moment etc. These properties form the reason for its significance in the biosphere. Water is an excellent solvent and therefore it helps in the transportation of ions and molecules required for metabolism. It has a high latent heat of vaporization which helps in the regulation of body temperature

Chemical properties of water: Amphoteric nature:

Water can act as both acid and base, which means that it is amphoteric in nature.

Example:

Acidic Behaviour: H2O(l)+NH3(aq) ⇌ H3O+(aq)+NH+4(aq)

Basic Behavior: H2O(l)+H2S(aq) ⇌ H3O+(aq)+HS−(aq)

Redox reactions:

Electropositive elements reduce water to hydrogen molecule. Thus water is a great source of hydrogen. Let us see an example in this case:

2H2O(l)+2Na(s)→2NaOH(aq)+H2(g)

During the process of photosynthesis, water is oxidized to O2. As water can be oxidized and reduced, it is very useful in redox reactions.

Hydrolysis reaction

Water has a very strong hydrating tendency due to its dielectric constant. It dissolves many ionic compounds. Some covalent and ionic compounds can be hydrolyzed in water.

Explanation:

7 0
3 years ago
On what day does FSH reach its maximum concentration? What is happening with regard to the ovary at this point and what is happe
erma4kov [3.2K]
On the 12th day the Follicle Stimulating Hormone reach its peak concentration.

 The Follicle stimulating hormone stimulates the growth of the egg-bearing follicles in the ovaries. The levels of Follicle stimulating hormone vary during the menstrual cycle and are best measured at its peak or baseline level. FSH levels level vary during the menstrual cycle, reaching their peak prior to ovulation. It is best to measure FSH on day three of the period via a blood sample which is called the baseline level. It provides the most accurate predictions of ovarian reserve. 
8 0
3 years ago
The tertiary structure of a protein is the:________. a. organization of a polypeptide into a corkscrew-like shape or a zigzag fo
Setler [38]

Answer:

e. unique three-dimensional shape of the fully folded polypeptide.

Explanation:

The tertiary structure of a protein is the unique three-dimensional structure which emanates from the interaction between the “R groups” of the several amino acids that make up the polypeptide. Hydrogen bonding is one of the interactions that occur that gives the protein this structure. Other interactions are ionic bonding, dipole-dipole interactions, hydrophobic interactions, among others. The function of a protein is dependent on its tertiary structure, as a disruption of the tertiary structure causes a protein to be denatured, thereby rendering the protein not functional.

3 0
3 years ago
Read 2 more answers
Other questions:
  • As water is heated the motion of the water molecules will generally
    6·2 answers
  • Biceps are made mostly of _____. neurons, squamous epithelial, cells, skeletal muscle, smooth muscle
    12·2 answers
  • Which of the following statements is true?
    6·1 answer
  • 20 overall, around ___________ teenagers contract an sti sexually transmitted infection) each year.
    14·1 answer
  • Convert the volume of CO2 you measured in the glucose reaction to moles of CO2 using the Ideal Gas Law to solve for n. Assume P
    5·1 answer
  • HELPP ? why would we want to manipulate or splice a human gene into bacteria
    14·2 answers
  • What kind of system is generally composed of a fluid system to move the heat from the collector to its point of usage and a rese
    10·1 answer
  • Question 3 (1 point)
    9·1 answer
  • Nucleus is discovered by whom
    7·1 answer
  • Which phase of the bacterial growth curve is defined by zero net growth due to a lack of nutrients and excessive waste products
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!