BIOLOGY MIDDLE SCHOOL

Breads and other whole grain foods are composed of very large polysaccharide molecules which contain hydrogen, oxygen, and which other element? A) carbon
B) iron
C) nitrogen
D) water

Answers

Answer 1
Answer: CHO is the short  term for carbohydrate in medical lingo.
So it would be Carbon, Hydrogen and Oxygen

A. Carbon is the answer

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What is immunity?
That is my question

Answers

Answer:

In biology, immunity is the balanced state of multicellular organisms having adequate biological defenses to fight infection, disease, or other unwanted biological invasion, while having adequate tolerance to avoid allergy, and autoimmune diseases.
the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.

Passive immunity is provided when a person is given antibodies to a disease rather than producing them through his or her own immune system.

A newborn baby acquires passive immunity from its mother through the placenta. A person can also get passive immunity through antibody-containing blood products such as immune globulin, which may be given when immediate protection from a specific disease is needed. This is the major advantage to passive immunity; protection is immediate, whereas active immunity takes time (usually several weeks) to develop.

However, passive immunity lasts only for a few weeks or months. Only active immunity is long-lasting.

Active immunity results when exposure to a disease organism triggers the immune system to produce antibodies to that disease. Exposure to the disease organism can occur through infection with the actual disease (resulting in natural immunity), or introduction of a killed or weakened form of the disease organism through vaccination (vaccine-induced immunity). Either way, if an immune person comes into contact with that disease in the future, their immune system will recognize it and immediately produce the antibodies needed to fight it.

Active immunity is long-lasting, and sometimes life-long.

Explain what type of stimulus each sense organ responds to and how.

Answers

The sense organs contain receptors that are sensitive to stimuli.

The nervous system consists of the central nervous system - brain and spinal cord -and peripheral nerves. Nerve impulses travel through the axons of neurones - nerve cells. Reflex actions are fast, automatic and protective responses.

Human vision is binocular, which gives us a good perception of depth. Vision defects include short-sightedness, long-sightedness and colour blindness.

Why do you think doctors try to use autografts rather than allografts on
burn patients?

Answers

Autografts are skin grafts from the own patient, so the skin will not be recognized as a foreign substance, and there is no chance that the body will reject the cells. 

Answer:

Autografts are skin from the own patient, so the skin will not be recognized as a foreign substance, and there is no chance that the body will reject the cells.

Explanation:

What would happen to a cell if its mitochondria were removed?

Answers

Well, the cell would be out of energy! The mitochondria plays a very important role in cell functions. With out it, it cannot do whatever job that needs to be acquired.
If the mitochondria was removed from a cell, the cell would no longer be supplied with energy for the mitochondria supplies ATP throughout each cell.

What type of graph is best for showing a relationship between two variables? A) pie graph B) bar graph C) line graph D) circle graph

Answers

line graph because you cane compete two things

How is mitosis in plant cells different from mitosis in animalcells?
A
Plant cells have rigid cell walls and no centrioles
B
Plant cells don't undergo mitosis
C
Plant cell mitosis is much slower
D
Plant cell mitosis is much faster

Answers

Your answer would be A, plant cells have rigid walls and no centrioles.
A, plant cells have rigid cell walls and no centrioles! :)
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PLEASE HELP ME Which of the following statements is true? Geographic isolation is the main cause of speciation. Hybrid organisms always produce sterile offspring. If a population is spread out over too large area, they may become extinct. Speciation can only happen when a population has very low genetic diversity. ----- A population of oak trees is separated by a large canyon. Which of the following is most likely to occur? The two populations will show cospeciation. The genetic variation between the two populations will increase. Natural selection will cause one population to die, and the other to live. Both populations will stop evolving. ------- Choose ALL the answers that apply. Extinction: only happens above the species level cannot happen to more than one species at a time can be caused by habitat destruction happens when a species or population dies out ------- Which of the following statements is true? Gene flow evens out genetic differences between populations. Genetic drift increases the genetic differences between populations. Natural selection, mutation, and genetic drift are random events. The bottleneck effect increases the genetic diversity of a population. --- A species is endangered if it _____. no longer exists anywhere on earth is in danger of becoming extinct is not native the environment has high genetic diversity --- Genetic drift _____. is a predictable event increases genetic differences between populations happens when random events change the genotype of a population happens when well-adapted organisms survive and reproduce more often than poorly-adapted organisms