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
Alisiya [41]
3 years ago
7

Some blind cave salamander have eye how might this be evidence that cave salamander evolved from sighted ancestors

Biology
2 answers:
Kaylis [27]3 years ago
8 0

If cave salamander didn’t evolve from sighted ancestors, it eyes would be a vestigial structure.

Cave salamanders live in the zone, with complete lack of light (dark zone), so this organisms adapted to that environment with blindness. It is believed that cave salamanders evolved from the ones that could see. The explanation of why they lost their sight is that they conserved energy needed to maintain sight to be more successful in reproduction.

artcher [175]3 years ago
3 0

Answer:

Eyes would be a vestigial structure.

Explanation:

A vestigial structure as a stunted organ that has little or no function in a particular organism. An example of this can be seen in the question above which states that some blind salamdras have eyes. These eyes have no use for these salamanders, so we can say that the eyes of the salamander is a vestigial structure.

According to the theory of evolution, organisms have undergone and undergo changes over time, with new species emerging from some common ancestor. Studying different groups of organisms, we realize several characteristics that serve as evidence for this theory. The presence of trace structures is one such evidence.

You might be interested in
Desribe the following in your own words:<br><br> 1) Solid:<br><br> 2) Liquid:<br><br> 3) Gas:
Mnenie [13.5K]

Answer:

Explanation:

solid : a hard stern shape that cannot be drunk like a watery substance

Liquid : a watery substance

gas : a vapor like substance that travels through the air

6 0
3 years ago
What organs are being affected from dwarfism???? And how????
Alexandra [31]

Pituitary dwarfism is caused by problems arising from the pituitary gland. The pituitary gland, also called the hypophysis, is a gland at the base of the brain that produces many different hormones. This gland is divided into the anterior (front) and posterior (back) halves. The anterior pituitary produces six hormones: growth hormone, adrenocorticotropin (corticotropin), thyroid stimulating hormone (thyrotropin), prolactin, follicle stimulating hormone, and lutenizing hormone. The posterior pituitary gland only produces two hormones: antidiuretic hormone (vasopressin) and oxytocin.

The growth process begins in the lower part of the forebrain in a small organ called the hypothalamus. The hypothalamus releases hormones that regulate the production of other hormones. When the hypothalamus releases growth hormone-releasing hormone (GHRH), the anterior pituitary is stimulated to release growth hormone (GH). Growth hormone then acts on the liver and other tissues and stimulates them to secrete insulin-like growth factor-1 (IGF-1). IGF-1 directly promotes the development of bone and muscle, causing bones to grow in length, and muscles to increase protein synthesis (make more protein).

Since growth is a complex phenomenon, it may be slowed down or stopped by abnormalities arising at any point in the process. Thus, dwarfism can result if there is a deficiency in any of these hormones, if there is a failure in the receptor cells receiving the hormonal stimuli, or if the target cells are unable to respond.

At its most basic, pituitary dwarfism results from decreased production of hormones by the anterior pituitary. When none of the hormones of the anterior pituitary are adequately produced, this is called panhypopituitarism. A common form of pituitary dwarfism is due to deficiencies in the production of growth hormone (GH). When less GH than normal is produced during childhood, an individual's arms, legs, and other structures continue to develop in normal proportions, but at a decreased rate.

<span>

hopre i helped</span>
7 0
3 years ago
DE QUE MANERA SE FORMO LA LUNA
BaLLatris [955]
Búscalo, Wikipedia es bien!!!
6 0
3 years ago
What occurs to the cell during mitosis?
gtnhenbr [62]
During mitosis the cell splits and becomes two
8 0
3 years ago
Read 2 more answers
What is the meaning of biosphere​
kotegsom [21]

Answer:

The biosphere is a global ecosystem composed of living organisms (biota) and the abiotic (nonliving) factors from which they derive energy and nutrients. Earth's environmental spheres. Earth's environment includes the atmosphere, the hydrosphere, the lithosphere, and the biosphere.

Explanation:

''.''

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the role of pollen grains in fertilization process?
    10·1 answer
  • Planet X is a planet in our solar system. Planet Y is a dwarf planet. Identify their characteristics. has moons and ringsis not
    9·2 answers
  • What is the correct order of geological time scales from largest to smallest?
    6·1 answer
  • Breeders can use a Punnett square, such as the one below, to predict the outcome of a genetic cross.
    11·1 answer
  • Every cell of every living thing on earth contains all the information it needs to create and duplicate and make variations of;
    7·2 answers
  • What is a template for a rna sequence
    15·1 answer
  • PLS HELP ASAP 100 POINTS IF YOU ANSWER THE QUESTION,DONT JUST ANSWER FOR THE POINTS I REALLY NEED THIS.
    10·2 answers
  • Which point in this graph sows the beginning of a period of exponential growth? A. Point C B. Point D C. Point B D. Point A
    7·1 answer
  • Which of the following is not a part of environmental science?
    12·2 answers
  • Changes in the shape of a cell usually involve a reorganization of the ______. A. nucleus
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!