The correct option is (A) solar radiation strikes the poles at a lower angle and travels through more atmosphere.
The main reason polar regions are cooler than the equator is that solar radiation strikes the poles at a lower angle and travels through more atmosphere.
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Why polar regions are cooler than the equator?</h3>
- Because they get much less solar energy than the tropics and mid-latitudes do, the earth's two pole regions are chilly.
- At either pole, there are six months of nonstop darkness and the sun never rises higher than 23.5 degrees over the horizon.
- Furthermore, the dazzling white surface reflects the majority of the sunlight that does reach the polar areas.
- The Arctic Ocean serves as a useful heat reservoir, absorbing heat from the atmosphere in the summer and warming the chilly winter environment.
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Answer:
The plasma membrane is a phospholipid
Explanation:
The plasma membrane is phospholipid bilayer. The layers are two and are continuous flat sheets. They have proteins and cholesterol embedded in them, for facilitating the transport of compounds and maintanng fluidity. The lipid bilayer is both hydrophobic and hydrophillic.
The correct answer for this question is Acetylcholine receptors at the neuromuscular junction i.e., B
The most basic type of is one in which a single protein or complex of proteins performs both hormone binding and signal generation. Ligand-gated ion channels are included in this category. They consist of two major components: a ligand-binding domain accessible from the cell's surface and a transmembrane domain containing a channel. Binding of ligand to the receptor's exofacial surface causes a conformational change that results in the opening of a pore, allowing specific ions to travel across the plasma membrane through the channel.
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Answer:
Two synapses.
Explanation:
Synapse or Synaptic cleft is the space two neurons or between a neuron or target organ where the signal is carried by neurotransmitter. Nerve signal first travel through interneuron to motorneuron passing through the first synapse, then the signal will travel to effector organ from motor neuron by passing through second synapse.
Answer:
Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane.
