Most probably the right choice for this is <u>A. extraembryonic membranes</u> because this is known as the structural adaptation in chickens that allows them to lay eggs in arid environments rather than in water.
The four extraembryonic membranes that surround the chick's embryo are the chorion, which helps with gas exchange, the amnion, which encloses amniotic fluid, the yolk sac, which protects the yolk, and the allantois, which helps with waste removal and gas exchange.
Physical traits that have evolved on chickens through time in order to help them live and reproduce are called structural adaptations.
Over time, the hens that are more well-adapted to their surroundings survive and breed more consistently, causing their genes and adaptations to be passed down to future generations of chickens.
Learn more about the two adaptations to plants: brainly.com/question/22557205
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Answer:
A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles.Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron. The neuromuscular junction is the name of the place where the motor neuron reaches a muscle cell. Skeletal muscle tissue is composed of cells called muscle fibers. When the nervous system signal reaches the neuromuscular junction a chemical message is released by the motor neuron. The chemical message, a neurotransmitter called acetylcholine, binds to receptors on the outside of the muscle fiber. That starts a chemical reaction within the muscle.Acetylcholine Is Released and Binds to Receptors on the Muscle Membrane.
A multistep molecular process within the muscle fiber begins when acetylcholine binds to receptors on the muscle fiber membrane. The proteins inside muscle fibers are organized into long chains that can interact with each other, reorganizing to shorten and relax. When acetylcholine reaches receptors on the membranes of muscle fibers, membrane channels open and the process that contracts a relaxed muscle fibers begins:
Open channels allow an influx of sodium ions into the cytoplasm of the muscle fiber.
The sodium influx also sends a message within the muscle fiber to trigger the release of stored calcium ions.
The calcium ions diffuse into the muscle fiber.
The relationship between the chains of proteins within the muscle cells changes, leading to the contraction.
Explanation:
Sry I don’t know how to explain It’s a lot.
The structure in the in the animal cell is the nucleus.
Answer:
Drastic changes in temperatures.
Explanation:
If it is warm, then it won’t be changing drasticlly, so pretty obvious ngl
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Hope This Helped!</u></h2>
The nucleus is a spherical object, and it controls cell activity.