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
Gnoma [55]
3 years ago
5

Which is an example of a negative feedback? The accumulation of blood platelets, which cause blood clotting, is triggered by a t

ear in the lining of the blood vessel. The production of red blood cells, which transport oxygen, is triggered by a low level of oxygen in the blood. During childbirth, the secretion of hormone oxytocin, which intensifies the contractions, is triggered by uterine contractions. NextReset
Biology
1 answer:
zlopas [31]3 years ago
4 0
<span>The production of red blood cells, which transport oxygen, is triggered by a low level of oxygen in the blood.  is correct.</span>
You might be interested in
According to Chargaff's rules, which of the following are possible base compositions for doublestranded DNA.
mr Goodwill [35]

Answer:

A) %A=5 %G= 45 %C=45 %T=5 %U= 0 .

Explanation:

DNA is the genetic material and transfer from one generation to the generation. The DNA composed of the nitrogenous bases, pentose sugar and the phosphate group.

The base pairing of DNA follows the Chargaff's rule. According to this, the purines an pyrimidine ratio is equal to 1. The number of adenine is equal with that of thymine and number of cytosine is equal to the guanosine. In option (A) this criteria is follows.

Thus, the correct answer is option (A).

4 0
3 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
What is the change in the characteristics of a population of
Kisachek [45]

Answer:

Changes population

And its no time to natural selection

7 0
3 years ago
During which phase in the control of the digestive system would bicarbonate and bile be stimulated?
Anuta_ua [19.1K]

Answer:

3. intestinal phase

Explanation:

Intestinal phase starts at the first segment of the small intestinal where we have the duodenum. In this phase, the partly digested food called chyme stimulates the enteroendocrine cells of the duodenum causing the release of the secretin hormone. The secretin is one of the hormones in the duodenum. It is a peptide hormone that functions mainly in regulating the acidity of the duodenum.  The secretin hormone stimulates the secretion of bile in the liver and also initiates the secretion of bicarbonate in the pancreas in response to the acidity of the chyme.

8 0
3 years ago
The calf muscle that bulges when a woman wears high heels is called the
Katyanochek1 [597]
 The correct answer is the gastrocnemius muscle.
<span>The gastrocnemius muscle is a muscle located in the back part of the lower leg of humans. The gastrocnemius together with the soleus muscle forms half of the calf muscle with the function is plantar flexing the foot at the ankle joint and flexing the leg at the knee joint.</span>
4 0
4 years ago
Other questions:
  • Need help will give 60 points
    12·2 answers
  • Arachnoid granulations are knoblike projections that protrude superiorly through the ________ mater to absorb cerebrospinal flui
    12·1 answer
  • Which type of molecule that can be found in living things lacks carbon atoms
    13·1 answer
  • Except for _____, birds are the only known species that can fly.
    13·2 answers
  • What are some examples of metabolism?
    12·1 answer
  • How do you calculate the surface area of a fish's caudal fin​
    9·2 answers
  • The two waves in the diagram are occupying the same place at the same time
    11·2 answers
  • The margins of parietal bone
    13·1 answer
  • DNA is made of two chains of nucleotides. Which type of bonds hold the chains together?
    7·1 answer
  • what evidence from the text to support the idea that lady Macbeth questions her husband ability to kill the king
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!