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
Molodets [167]
3 years ago
13

]The theories on the origin and expansion of the universe have changed from time to time. Which of these best explains why the t

heories about the universe change over a period of time?
new scientific investigations lead to new theories
modern scientists reject old theories in every century
the universe evolves constantly and requires new theories to describe it
the discoveries of all scientists in different centuries have to be incorporated
Biology
2 answers:
stepladder [879]3 years ago
7 0

Answer:

Option A

Explanation:

New scientific investigation about universe always comes up with new theories. This happens because of two reasons -  

a) The exact knowledge of universal phenomenon is not known which lead to continuous investigation and hence new laws come up every time when a study or research is done

b) Also some scientist believes that universe is continuously expanding and changing due to which our previous theories no longer fit the current observations.  

Hence, option A is correct

alisha [4.7K]3 years ago
6 0
I would say the answer is A
You might be interested in
Which of the following statements about fluid movement is NOT correct?
allochka39001 [22]

Answer:

b. Exchange between the plasma and the intracellular fluid occurs across the cell membrane.

Explanation:

The body fluid can be categorized as extracellular and intracellular fluid. The fluid within cells is called intracellular fluid and the body fluid outside body cells makes the extracellular fluid. The interstitial fluid is the extracellular fluid that is present in the narrow spaces between cells of tissues.

On the other hand, the extracellular fluid present within blood vessels is termed blood plasma. Therefore, plasma and intracellular fluid can exchange material via interstitial fluid only, not directly via the cell membrane. The exchange between interstitial fluid and intracellular fluid occurs across the cell membrane.

8 0
3 years ago
Which stage is the dominant stage in mosses?
erastovalidia [21]

Answer: diploid generation

Explanation: MORPHOLOGY AND DEVELOPMENT OF THE MOSSES

In vascular plants the dominant stage of this lifecycle is the diploid generation. In mosses, the dominant stage is the haploid generation (the gametophyte). This means that the green, leafy gametophytic tissue is haploid (has only one set of chromosomes). hope this helps. Can u give me brainliest

4 0
3 years ago
PLEASE HELP ITS URGENT What is the functionof the peripheral nervous system? A. To transmit signals between the body and the bra
Rzqust [24]

Answer:

The peripheral nervous system (PNS) is one of the two components of the nervous system, the other part is the central nervous system (CNS). The PNS consists of the nerves and ganglia outside the brain and spinal cord.[1] The main function of the PNS is to connect the CNS to the limbs and organs, essentially serving as a relay between the brain and spinal cord and the rest of the body.[2] Unlike the CNS, the PNS is not protected by the vertebral column and skull, or by the blood–brain barrier, which leaves it exposed to toxins and mechanical injuries. The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system. In the somatic nervous system, the cranial nerves are part of the PNS with the exception of the optic nerve(cranial nerve II), along with the retina. The second cranial nerve is not a true peripheral nerve but a tract of the diencephalon.[3]Cranial nerve ganglia originated in the CNS. However, the remaining ten cranial nerve axons extend beyond the brain and are therefore considered part of the PNS.[4] The autonomic nervous system is an involuntary control of smooth muscle and glands. The connection between CNS and organs allows the system to be in two different functional states: sympathetic and parasympathetic

Explanation:

3 0
3 years ago
FIRST ANSWER BRAINLIEST!! BIOLiOGY!! IF RIGHT!!
natima [27]

a is the answer

i have to type more

8 0
3 years ago
A vein in a leaf has what important function?
SpyIntel [72]
Veins provide support for the leaf and transport both water and minerals (via xylem) and food energy (via phloem) through the leaf and on to the rest of the plant.
6 0
3 years ago
Other questions:
  • Which natural resource is known as the kidneys of the environment? A.fisheries B.wetlands C.soil D.natural parks E.wildlife
    9·2 answers
  • One difference between cell division in plant cells and in animal cells is that plant cells have
    5·2 answers
  • How does the water flow past and present in the everglades?
    14·1 answer
  • Which of the following have no true issues?
    7·1 answer
  • Passive transport differs from active transport because Passive
    9·1 answer
  • Proteins in the cell membrane that identify the cell are called what
    5·1 answer
  • How would the process of photosynthesis be affected if an outdoor garden didn't receive enough water due to drought
    12·1 answer
  • Explain why fermentation wold take over and not the krebs cycle.how long would it last?
    15·1 answer
  • How does getting fit change teens and provide benefits beyond healthier bodies?
    10·2 answers
  • What is the volume of a cube with a side length of 3 centimeters?(1 point)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!