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
serg [7]
3 years ago
12

Select all that apply. The four major functions of hormones are _____.

Biology
1 answer:
vazorg [7]3 years ago
5 0
(homeostasis) (response to stimuli) (reproduction) growth and development
You might be interested in
Sequence the steps, 1–4, in the order required to create a permanent slide of human cheek cells. [1 mark] Specimen dehydrated Sp
gogolik [260]

Answer:

The correct order is dehydration, embed in wax, cut into sections, staining

Explanation:

There are certain proceedings needed to obtain stained sections of vegetable or animal tissues for their microscope observations.

These steps are:

  • Obtention of the material: The tissue is cut to an adequate size.
  • Fixation: When tissues are extracted from the organism, they suffer autolysis and putrefaction, so they need to be fixated in order to keep their cells in the best state possible. Fixation involves preserving the original morphological and molecular characteristics of the tissue. Fixation avoids autolysis, putrefaction, distortion, and retraction of cells and the tissue that could affect its volume or morphology.  
  • Dehydration. Once fixated, the fixator must be eliminated and the tissue is dehydrated by using a gradual series of solutions with alcohol in ascendant concentrations. Dehydration must be gradual to avoid tissue deformation.
  • Inclusion. To obtain thin cuts that can be observed under the optic microscope, the tissues must be included in a consistent, firm substance, that might be either hydrophilic or hydrophobic. A hydrophobic medium is paraffin wax, that provides hardness and plasticity.  
  • Cut. The tissue included in wax must be cut in slides or sections thin enough to allow the diffusion and penetration of light. A microtome is used to perform these cuts. When using paraffine for tissue inclusion, the cuts are about  5 to 20 micrometers of thickness.
  • Stain. Once the cuts are performed, paraffin wax must be eliminated. This can be done by using an organic solvent. Then the tissue must be stained. Hematoxylin and Eosin are the most common dyes. Animal tissues in general do not have any natural color, so they need to be stained to be observed.  
7 0
3 years ago
Seasons are caused by ?
NikAS [45]

Answer:

Explanation:The seasons are caused as the Earth, tilted on its axis, travels in a loop around the Sun each year. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun.

3 0
3 years ago
Read 2 more answers
Sharks an dolphins look very similar so are they related
olganol [36]

Probably very distantly, but sharks are fish, and dolphins are mammals.

4 0
3 years ago
Hiv can be transmitted from mother to fetus, and approximately 1/3 of infected infants will die within a few years of birth. the
Reil [10]
If a woman takes HIV medicines during pregnancy and childbirth and her baby receives HIV medicines for 4 to 6 weeks after birth, the risk of transmitting HIV can be lowered to 2% or less. Most HIV medicines are safe to use during pregnancy, and don't increase the risk of birth defects.

In general, the infected mother should simply stay healthy and intake HIV medicines while she is pregnant.
3 0
3 years ago
Light sensitivity in the euglena is provided by the eyespot. <br><br> true or false??
madam [21]
That statement is true
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement regarding sex chromosome abnormalities is incorrect?
    7·1 answer
  • The roles of the nurse in working with clients and families include which of the following?
    5·1 answer
  • Put out clothing fires or remove large chemical splashes in a ________________ _______________
    11·2 answers
  • What does y most likely represent?
    10·2 answers
  • What do we call the chemical that cells need to work and reproduce?
    9·1 answer
  • Need answer ASAP!! Will mark BRAINLY
    6·1 answer
  • This is my question hope you could help someone in the future because I don’t have time to wait :)
    10·1 answer
  • Viruses are considered to be___________ because________________
    10·2 answers
  • Please help I’ll mark you as brainliest if correct
    12·1 answer
  • 1.5 why clouds produce rain amplify science
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!