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Artist 52 [7]
4 years ago
7

1. Wegener formed the theory of continental drift in 1912. What prevented research of the ocean floor, paleomagnetism, and earth

quakes at that time?
PLZ HELP!!! I NEED ANSWERS ASAP!!
Biology
2 answers:
exis [7]4 years ago
6 0
<span>When Alfred Wegener developed the theory of continental drift in 1912, not many thought those theories of movement of continents are valid and the scientific community did not accept his theory at that time and that did not allow him to research further on ocean floor, paleo-magnetism, and earthquakes.</span>
KiRa [710]4 years ago
5 0

It was not accepted during Wegener's lifetime because, mainstream scientists that time didn't know the mantle was liquid, they thought it was solid.  They thought the throry was illegitimate because continents did not fit exactly together.

The evidence supporting Wegener's theory was all discovered after his lifetime, like the Seismographs revealed a pattern of volcanoes and earthquakes, and Radiometric dating of rocks revealed a surprisingly young oceanic crust.

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Describe the functions of the four photoreceptor proteins in human vision.
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Answer:

In human vision, the cone visual opsins are grouped into four photoreceptor protein families LWS, SWS1, SWS2, RH2 .

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  • LWS: produce pigments sensitive to long wavelengths, yellow-red, 560-770nm.

Explanation:

Photoreceptor proteins are light-sensitive proteins that mediate light-induced signal transduction, thus they are involved in the sensing and response to light in a variety of organisms.

The photoreceptor proteins are classified based on the chemical structure of the chromophores involved, the light absorption and on the protein sequence.

This photoreceptor proteins are located at the cone photoreceptor cells and are responsible of photopic vision.

For scotopic vision, rhodopsin is responsible. Rhodopsins are the visual pigments (visual purple) of the rod photoreceptor cell in the retina. They are responsible of human vision in dim light, as it contains a sensory protein that converts light into an electric signal.  

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The peripheral nervous system is made up of two systems; the _____________ nervous system controls muscle movement and the _____
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