Answer:
open; depolarized
Explanation:
The photoreceptors, i.e., rods and cones, are specialized neurons located in the retina. These cells convert sunlight into electrochemical signals which are interpreted by the central nervous system. The cGMP-gated channels that are expressed in photoreceptor plasma membranes have a major role in this process by regulating the flow of sodium (Na+) and calcium (Ca2+) ions in the outer side of the membrane via changes to cyclic guanosine monophosphate (cGMP) levels which are induced by light. In the dark, high cGMP levels maintain channels in an open state, thereby allowing the passage of Na+ and Ca2+ ions to flow into the outer segment of photoreceptors in order to maintain them in a depolarized state.
Answer:
<em>The correct option is C) Eunice switched the filament and stamen.</em>
Explanation:
The stamen is the main part of the male reproductive system. A stamen comprises of anther and filament. The anther is the part of the stamen which produces the pollen. The pollen are involved in the fertilization of ovules in the female. Hence, the correct option is C.
Answer:
In both cases, the gravitational pull of the sun is 'added' to the gravitational pull of the moon on Earth, causing the oceans to bulge a bit more than usual. This means that high tides are higher and low tides are lower than average. These are called 'spring tides.
Explanation:
(D) It is especially important to protect biodiversity hot spots.
<h3>What is Biodiversity?</h3>
The variety and variability of life on Earth is referred to as biodiversity or biological diversity. A measure of variety at the genetic (genetic variability), species (species diversity), and environmental (ecosystem diversity) levels is called biodiversity.
Because of the warm environment and high primary productivity in the area close to the equator, the tropics typically have higher levels of biodiversity than other parts of the planet. Less than 10% of the earth's surface is occupied by these tropical forest ecosystems, which are home to 90% of all species. The mid-latitudinal belt of all oceans and the shores of the Western Pacific, where the sea surface temperature is highest, typically have higher levels of marine biodiversity. The variety of species exhibits latitudinal variations.
Learn more about Biodiversity with the help of the given link:
brainly.com/question/27438508
#SPJ4
