<span>These elements are oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus.</span>
Worldwide, there are 107 boy babies born for every 100 girl babies. This skewed ratio is partly due to sex-selective abortion and "gendercide," the killing of female infants, in countries such as China and India where males are more desired. But even discounting those factors, the completely natural male-to-female sex ratio still hovers around 105:100, meaning that women are inherently more likely to give birth to boys. Why?
Several factors influence whether a sperm containing a Y sex chromosome or one containing an X chromosome will be first to fertilize an egg, including parental ages, their environmental exposure, stress, the stage in the mother's ovulation cycle and even whether she has had children previously; all these forces combine to set the average sex ratio at fertilization at 105:100.
Answer chooses will help .
When a signal molecule binds a membrane receptor, different intracellular events occur in response. Option D is correct: All of the above.
<h3>
What is signals translation and how is it done?</h3>
Signal translation is the conversion global process of extracellular signals into intracellular responses. This porcess is done by a translator.
Translation might be
- INDIRECT ⇒ <u>Second messengers</u> participate in the signal translation, mediating between receptor and the cellular response.
The receptor-ligand union causes the production of second messengers that will activate effector proteins. Occurs an amplification of the signal.
- DIRECT ⇒ Occurs directly in the membrane.
<u>Ionic channel proteins</u> are activated and can change the chemical signal into an electric signal through ion flow.
When the molecule binds receptors that are associated with enzymes -or acting as enzymes- or to G proteins, it occurs a conformational change in the receptor cytoplasmic domain.
This change triggers an intracellular signal cascade in which many molecules participate and several<u> chemical changes</u> occur.
According to this framework, all the options are correct,
- The receptor can open an ion channel in the cell membrane.
- The receptor can act as an enzyme causing chemical changes in the cytoplasm.
- The receptor can cause the formation of a second messenger.
So te correct option is Option D. All of the above.
You can learn more about membrane receptors at
brainly.com/question/19371673
brainly.com/question/703787
Explanation:
<h2>The 'Reduce', 'Reuse' and 'Recycle' elements are referred to as the '3 R's' Reducing - Try to reduce the amount of waste you produce, as this is the best way to help the environment!</h2>
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