Greenhouse gases contributes the most
Drugs<span> are chemicals that </span>affect<span> the brain by tapping into its communication system and interfering with the way neurons normally send, receive, and process information. Some </span>drugs<span>, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter.
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Answer:
Genetic disorders are conditions or diseases that are inherited by a person from the parent which is caused by mutation of the DNA.
HIV is different from genetic disorder because it is not inherited rather it is acquired through sex or contact with an infected person's blood through cut,pictures or transfusion.
Explanation:
HIV is a disease that weakens the body defence mechanism in fighting infections thereby making it prone to Infection.it can be acquired through sex or contact with infected person's blood.
Genetic disorders are inherited conditions which is caused by DNA mutation.
Answer:
Excitement
Explanation:
Sympathetic nervous system is a type of autonomic nervous system that acts as an emergency system of the body.
Sympathetic nervous system prepares the body during fight and flight response. The energy is put out in this system and protects the body from the injury. During excitement the heart speeds up, blood pressure increases and more energy is available to the body. Hence, excitement is the characteristic of sympathetic division of nervous system.
Thus, the correct answer is option (b).
Answer:
True
Explanation:
The study of the formation and development of the embryo is very useful in evolutionary biology in order to determine similarities derived from a common ancestor (i.e. homologies). In consequence, embryology is a discipline used to establish relationships between species and higher taxa. For example, vestigial organs and/or tissues (e.g., tails in humans) can be observed in the embryos during the first stages of development. In this regard, embryology has been an important aspect of the evolutionary theory proposed by Darwin (1859) by evidencing the process of species radiation from their ancient ancestors.
