Answer:
Invertebrates.
Explanation:
Invertebrate refers to animals with no backbone.
Answer:
Genes
Explanation:
Gregor Mendel discovered in his experiments that a factor determined the physical characteristics of an organism. This factor is called a gene. A gene is the molecular unit of heredity in a living organism.
Genes are segments of DNA that holds the information needed to build and maintain an organism and pass genetic traits to offspring. The trait of an organism, which refers to the physical characteristics of an organism, are passed from parents to offsprings via genes. The genes also contain variant forms called ALLELE that determines which trait an organism will possess.
Decreasing the number of phospholipids in the plasma membrane
<span>An injury to Head/brain can hamper sleep -wake cycle.
other than that injuries to other regions can also hamper the sleep-wake cycle, because the pain could be unbearable resulting in loss of sleep.
So it is also dependent on kind and severity of the injury.</span>
I believe because head movements specifies what the person is thinking of a conversation and might lead the other person into thinking that the person they're talking to might find the topic boring or uninteresting to hear