A lichen is composed of two distinct organisms living together that behave like a single organism. true false
<span>True</span>
The smooth Er is involved in the synthesis of lipids
<span>The correct answer is B. As one parent cactus is dominant heterozygous, and another is homozygous recessive, half of the progeny will bear long needles (as they carry dominant allele L), and hald will bear short needles (As they carry both recessive alleles).</span>
Nerve cells or neurons are, fundamentally, cells of the nervous system, they are responsible for the transmission of nerve impulses and communicate with one another through connections called synapses .
Neurons are typical of all vertebrates, although in the rest of the animal kingdom there are other cells that have similar functions.
So, the right answer is A. Horse.
