Answer: Giving birth only in the spring and summer ensures that offspring are born when food is most available.
Explanation:
<span>Complete this statement. A person with Rh+ blood may receive blood that is RH or HR while a person with Rh- blood can only receive RH blood.</span>
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.
<span>Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach. When the stomach digests food, the carbohydrate (sugars and starches) in the food breaks down into another type of sugar, called glucose. ... However, our bodies need insulin in order to use or store glucose for energy.</span>
Root growth from the seed growing downwards to provide more sub roots then they grow into a hair like substance it remains attached as the stem is growing up and then it breaks the soil and develops leaves.