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Marat540 [252]
3 years ago
9

Which of the following is true of environmental changes?

Biology
1 answer:
Nutka1998 [239]3 years ago
7 0
<span>b. they may affect several populations in an ecosystem.
</span>
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Evolutionary theory has become the central organizing principle of biological science. Could this scientific theory ever become
sveta [45]

The answer requires looking at the meaning of the words 'theory' and 'law'. The formal definition of a theory is that it is a comprehensive explanation of a observed phenomenon supported by a lot of evidence. Law is a fact that is bound to be true in nature, example Newton's second law. However, a theory is subjected to continuous refinements based on the several new findings that happen with time. These refinements make the theory appear incomplete. As with the theory of evolution, a lot of research work is being put to understand the complex phenomenon of genetic inheritance of traits of behaviour. Unless there are evidences from nature for all the aspects of evolution in theory, it'll remain a theory and not become a law.

Answer is A) Yes, if scientists decide that enough evidence supports the theory.


6 0
3 years ago
Which protein serves as a chemical messenger? hemoglobin actin myosin insulin
kompoz [17]
Insulin is the correct answer.
Hope ti helped!
4 0
3 years ago
Help please?
MatroZZZ [7]

1. The right answer is AC (alternative current) generators.

AC current (which can be abbreviated as AC) is a periodic electrical current that changes direction twice per period and carries alternating amounts of electricity in one direction and the other1. An alternating current therefore has a continuous component (average value) zero.


2. The right answer is Repel, and attract.

The nucleus of an atom is an assembly of protons and neutrons concentrated in a very small volume and subjected to two different forces: the nuclear force and the electric force.

The electric force only acts on charged particles, attracting those which are of opposite signs and repelling those of the same sign. This "long" distance force allows the negatively charged electrons to be retained around the positively charged nucleus.


3. The right answer is electric circuit

An electrical circuit in the material sense is a simple or complex set of electrical or electronic components, including simple conductors, traversed by an electric current.

In the sense of circuit theory, an electrical circuit is an abstraction of material configurations, an arrangement of elements defined by mathematical relations, connected by ideal conductors.


4. The right answer is Volts and current.

Volt (V) is the unit of measurement of the electrical voltage in a circuit between a point A and a point B, obtained with a device called a voltmeter. It is to Alessandro Volta, Italian physicist and inventor of the electric battery, that we owe this name.

The ampere (A) is the unit of measurement of the intensity of an electric current, that is to say the flow of electrons in a conductor. André-Marie Ampère, the inventor of the electromagnet, gave his name to this unit.


5. The right answer is north pole.

The magnetic North Pole of the Earth is a unique wandering point on the surface where the Earth's magnetic field is pointing down. That is, the "dip"  is 90 °. The needle of a compass points approximately towards this place (more or less approximately according to the place where one is, exactly the compass is tangent to the line of field).


6. The right answer is perpendicular.

In a cyclotron, the magnetic field is applied perpendicularly in an empty disk-shaped chamber, which contains two D-shaped semicircular electrodes. The rectilinear portions of these electrodes face each other. The flow of electrons or ions crossing a perpendicular magnetic field is subjected to a forceperpendicular to the direction of movement.


7. The right answer is current

A solenoid is a device consisting of an electric wire wound regularly in a spiral so as to form a long coil. Running through a current, the solenoid produces a magnetic field in its vicinity, and more particularly inside the helix where this field is almost uniform.

8 0
3 years ago
Read 2 more answers
What is the role of a pioneer species in primary succession?
Anastaziya [24]
To create soil i think
4 0
3 years ago
Read 2 more answers
Can you match these prefixes, suffixes, and word roots with their definitions? a. omni- first: eat: few: under, below: from, out
natima [27]

Answer:

The correct matches are:

  1. all: omni-
  2. first: prim-
  3. eat: -vor
  4. few: oligo-
  5. under: sub-
  6. below: sub-
  7. from: de-
  8. out of: de-
  9. remove: de-
  10. water: hydro-
  11. flesh: carn-
  12. animal: zoo-/zoa-
  13. killer: -cide
  14. self: auto-
  15. between: inter-
  16. other: hetero-
  17. food/nourishment: troph
  18. heat: calor-
  19. beyond: ultra-
  20. within: intra-
  21. light: photo-
  22. alongside: para-

Explanation:

Since scientific terms are harder to understand, some common prefixes (word added to beginning of another) , suffixes (word added at the end) and root words can be used to correctly guess the meaning of a biological term. Most of the terms have been derived from ancient Greek and Roman words.

  1. The prefix omni- means all. E.g, an omnivore is a type of animal that eats both plants and animals.
  2. Prim- is a prefix that means first or foremost. In some cases, it also means basic or fundamental. E.g the primal instincts of any animal are its basic and innate characteristics.
  3. Vor is a suffix that mean eat or devour. E.g, carnivore is an animal that eats meat.
  4. Oligo is a prefix that means few or little. E.g, oligosaccharide is a carbohydrate containing few sugar molecules.
  5. The prefix sub- means both under and below. E.g, subcutaneous means under the layer of the skin.
  6. The prefix sub- means both under and below. E.g, subcutaneous means under the layer of the skin.
  7. The prefix de- means remove, away from or down. E.g to degrade means to break down or break away.
  8. The prefix de- means remove, away from or down. E.g to degrade means to break down or break away.
  9. The prefix de- means remove, away from or down. E.g to degrade means to break down or break away.
  10. The prefix hydro means water. E.g, hydroelectric power is energy derived from water.
  11. Carn is a prefix that means flesh or meat. E.g, a carnivore is an animal that eats meat.
  12. The prefix zoo or zoa defines an animal or of animal origin. E.g, zoology i.e. the study of animals.
  13. The suffix, -cide means to kill or destroy. E.g, fungicide is a chemical that kills fungi.
  14. Auto is a prefix that means self. E.g, autophagy is the pahgocytosis or engulfing of the body cells by other cells of the body.
  15. Inter is a prefix that means between. E.g, intercellular means between the cells.
  16. The prefix heter or hetero means different or other. E.g, heterogeneous is a type of mixture that contains different types of elements.
  17. Troph is a suffix that means feed or nutrition or nourishment. E.g, autotroph is an organism that produces its food by itself.
  18. Calor means heat. E.g, calorimeter is an instrument that measures heat or change in heat.
  19. Ultra is a prefix that mean beyond. E.g, ultrasonics are sound waves that are beyond the audible hearing range.
  20. Intra is a prefix that means within. E.g, intracellular means within or in the cell.
  21. Photo is a prefix that means light. E.g, photosynthesis is a process that plants use to make food by capturing light.
  22. Para is a prefix that means beside, near, equal or alongside. E.g parathyroid is a gland near the thyroid gland.

5 0
3 years ago
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