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
lana66690 [7]
2 years ago
5

Summary of the Nervous System

Biology
1 answer:
tatuchka [14]2 years ago
4 0

Answer:

The nervous system uses electrical and chemical means to help all parts of the body to communicate with each other.

Explanation:

You might be interested in
The outermost layer of a virion fulfills which of the following functions of the virus?
IrinaK [193]

Answer:

The correct answer is D. The outermost layer of a virion fullfills both protection and recognition functions of the virus.

Explanation:

A virion is a single viral particle. In this form the virus is physically isolable but without metabolic activity. Many virions can even be crystallized.

A virion, infecting a single host cell, is capable of producing thousands of descendants using the mechanisms of DNA replication, transcription and translation of the infected cell. This viral multiplication is often sufficient to kill the host cell by breaking it (lysandola).

Nucleic acid gives infectious power to the virion. It is enclosed by a protein wrap called capsid which is always formed by a number of individual proteins, called structural subunits. These subunits, associating in a specific way, form larger complexes called capsomeres. The set of nucleic acid and proteins is called the nucleocapsid of the virus, which can be enclosed by a membrane called pericapside envelope. Viruses without this membrane are called naked. Virus membranes are made up of a lipid bilayer, often associated with virus-specific proteins.  The main function of the envelope is to help the virus enter the host cell. The surface glycoprotein serves to identify and bind to the receptor points in the host membrane. The viral envelope is then fused with the cell membrane, allowing the capsid and the viral genome to enter.

A step further down the evolutionary scale is the virino and below it the viroid and the prion; higher up is the virus.

8 0
4 years ago
State five qualities of good draught animals. State four precautions to be observed when using draught animals
lesya692 [45]

Answer:

1. Conformation

Conformation refers to the form or shape of an animal. An animal with good conformation has a shape which shows the normal characteristics of its species and breed.

An animal used for draft must have a build well suited for pulling. It should be low to the ground, have powerful shoulders and legs, and have a broad frontal dimension that will accommodate the placement of a harness. It must be big enough to deliver, alone or in a pair, the power needed to pull equipment for an extended period of time. It must also be able to exert the concentrated or "instantaneous" effort needed to overcome temporary increases in the draft requirement caused by roots, rocks, hard soil, or inclines.

While some animals are bred to produce good draft abilities, within any breed individual animals vary greatly in these qualities, and care must be taken to choose those with the most potential. A thin but well-balanced animal can be strengthened with a good diet, health care, and work. However, an animal with a swayback, bad legs or impaired vision will be a constant source of trouble.

Selection is a process of matching ideal qualities against those seen or latent in a given animal. Good draft animals, regardless of species or breed, will have the following qualities:

• head well proportioned; squarish, sculptured look

• balanced vision and hearing; head carriage high and straight

• normal mouth; good teeth and jaw structure

• body should have depth and width; short, full neck, full shoulders, broad chest, and straight, broad beck

• wide, thick hindquarters, lowset and evenly-fleshed

• short legs, straight and square to the body; ample bone

• clean, well-developed joints; no swelling or unusual boniness; no turning in or out of knees or hoofs; free movement of limbs

• feet straight, hard; normal angulation of hoof.

Temperament

Temperament refers to the nature or disposition of an animal. Part of its temperament is determined genetically, both by breed and parentage; some of it is learned-a response to the treatment it receives from other animals or the people who raise and handle it.

Temperament is reflected in an animal's behavior, the way it moves and acts, and the way it reacts to the things around it. It is difficult to know much about temperament from the quick evaluation that usually precedes the purchase of a draft animal. The buyer must guess, from what is observable, whether or not an animal will accept new routines or maintenance and training, behave well in a pair, and prove to be a spirited yet steady-paced and manageable worker. Sometimes, what is observable is not typical of the animal's behavior. A basically lethargic bull, for example, may become very alert or nervous at the approach of a stranger, exhibiting a fierceness that could be misinterpreted as a strong yet controllable spirit. A donkey that is mishandled and mismanaged might kick or butt at its owner, or at any adult, but be led away quite easily by a child. The buyer must be aware of such possibilities and at the same time drew some basic conclusions about the animal's temperament.

The following are signs of good temperament:

• Good overall conformation and health. The animal has no physical handicaps that require it to compensate with aggressive or stubborn behavior. An animal with bad vision or hearing, an unsound leg or joint, or with a chronic respiratory or muscular weakness, protects itself by balking, spooking, shying, refusing to be harnessed or lying down during work. Its temperament is affected or shaped by its physical condition.

• The animal accepts the handling of the owner. The owner can pick up the animal's foot, open its mouth, lead it with a rope without having to use force or harsh measures.

• It does not shy or kick at other animals. The buyer should try to be present when it is being turned out with a herd or put into a corral with other animals. If an animal is unusually aggressive or cowardly, it may not work well in a pair. Aggressive animals force their work-mates to shy or lean out of the yoke or harness, while cowardly animals may refuse to step evenly with their mates, lagging behind.

When an animal is taken from its herd or original owner and staked out or corralled in a new place, it may experience shock. The animal may show signs of aggression, withdrawal, stubbornness, fear, or general anxiety. None of these reactions is unnatural during the adjustment period, and should not be taken as a sign of an unsuitable disposition. An animal's character becomes clear later, during training and preseason work. At that time the farmer can judge the ability of the animal to work as part of a pair or team. Buying an animal early in the offseason allows the owner time to seek a replacement should a problem arise.

3 0
2 years ago
Mutations that affect multiple genes or entire chromosomes usually take place during
Rina8888 [55]

Answer: e

Explanation:

8 0
3 years ago
2. An example of an internal stimulus
MariettaO [177]
Thirst.
You experience thirst in your mouth just like you experience hunger in your stomach. The other example will be experience by organs or other body parts that are touching the air or are on the outside of your body.
4 0
3 years ago
Help me I will give anyone who answers it brainiest
jeyben [28]

Answer:

Amylase breaks: down starches and carbohydrates into sugars.

Protease breaks: down proteins into amino acids.

Explanation:

3 0
3 years ago
Other questions:
  • What happened to the deer population when the number of wolves was low?
    7·1 answer
  • How do breeders produce new genetic variations not found in nature?
    5·1 answer
  • Please help!!!!!!!!!!! Question in picture.
    12·1 answer
  • What is Grave's disease?
    11·1 answer
  • Francesco Redi conducted an experiment to test the hypothesis that maggots arose via spontaneous generation. What prediction did
    11·2 answers
  • Which answer describes the authors sentence?
    15·1 answer
  • (03.02 MC)
    6·2 answers
  • Put the various atmospheres into the order they occurred from earliest (TOP) to latest (BOTTOM)
    6·1 answer
  • Does this happen in salt water bodies of
    11·1 answer
  • Use the pedigree to figure out the genotype of I-3 and I-4 Will choose brainliest!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!