Here's Joel's Explanation :D
Plant's get energy from the sun light, then herbivores and insect eat the plants. After that is the Predator vs Prey, Carnivores come and eat the herbivores transferring the energy to them. Then Bacteria decomposes the bodies of the animals and gives nutrition to the soil. Finally the nutrient in the soil is once again given back to the plants. :D
Refer to the picture I left below if you still need further help. :)
Hope I was able to help. :)
As hinted in the question, the cross bridge cycle is a
series of molecular events that occur after excitation of the sarcolemma. A
cross bridge is formed when a myosin head bound to actin. The cross bridge
cycle depends on the presence of calcium ions
How does a new hypothesis replace an older explanation of something in the natural world? To understand this let us look at one of the classical example of geocentric theory and heliocentric theory. The geocentric theory states the Earth is at the centre of the solar system and the Sun, Moon, and all the other planets revolve around it. This ancient theory failed to explain the phenomenon like the phases of Moon, solar eclipse and lunar eclipse. The modern heliocentric theory which states that the Sun is at the centre of solar system, and all the planets including the Earth revolve around it. This theory was able to explain all the phenomenons unlike the geocentric theory. Hence the heliocentric theory replaced the geocentric theory.
C. a capital letter. an allele is represented by one letter so that gets rid of b and d. since there doesn’t need to be two purple alleles for the flower to be purple (we know this because the white flowers have white alleles which combine with the purple) that means it’s the dominant allele, making it an uppercase letter.
Pretty sure it's basically saying to answer it for yourself and 3 other people. So for the tongue roll, on self, if you can roll your tongue say yes, for subject 1, ask another person, if they can say yes, if subject 2 (another person) can't, say no, and so on.