Answer:
4, 3 5, 1, 2.
Explanation:
The events of muscle contraction begins from the presynaptic neuron, which cause the influx of Ca+, and the release of acetycholine neurotransmitter into the synaptic cleft.
The Ach, binds with the receptors in the sarcolemma, leading to opening of Ligand gated Na+ channels. Therefore Na+diffuses in, causing depolarization, and propagation of action potential along the sarcolemma spreading to the T-tubules.
This is followed by opening of Calcium channels leading exist of Ca+ from the sarcoplasmic reticulum.
The Calcium binds with the troponin, and Tropomysoin exposed the myosin binding sites on the actin filament.Thus cross-bridge is formed by the myosin head with thin filaments which shortened the sarcomere, leading to contraction of muscle fibres.
Answer:
540
Explanation:
In this case, the mutation rate from the allele black fur to the allele gray fur decreases by 10 percent per generation, while the original number of black fur alleles is 600.
Percentage of 10% of 600 = (10 x 600) / 100 = 60 alleles
In consequence, the number of black alleles in the next generation will be >>> 600 - 60 = 540 alleles
Answer:
The correct answer is - habitat and niche.
Explanation:
The spider monkey gets a place to live in rain, and fruit to eat, and also protection from predators like the jaguar and large snakes from the big forest trees. All these characteristics are the characteristics of the habitat of an organism.
It also explains the position of the spider monkey in the ecosystem and explains how it interact in the ecosystem which is the characteristic of the niche of an organism.
<span>Radiolarians have a cell wall made of
.....
According to </span>
https://microbewiki.kenyon.edu/index.php/Radiolaria <span>
"</span>
Radiolaria are unicellular organisms. They have mineral skeletons (tests) that are composed
of silica. The tests are formed through the absorption of silicon
compounds. This skeleton is covered with cytoplasm, which is withdrawn
if the organism is disturbed."
There cell wall is made of according to another website
...
<span> "Radiolaria....have cell walls made up of thick cellulose walls"
Hope this helps:)
@SamSamySamantha
</span>
The answer is D
( some forces keep object around us from moving)