Answer:
The correct answer is " two cardiac muscle cells are connected by gap junctions".
Explanation:
Intercalated discs are microscopic features seen in the microscope as cardiac fibers, found between the myocardial cells of the heart. These features correspond of two cardiac muscle cells connected by gap junctions. The intercalated discs allow the interconnection of multiple cardiac cell muscles to work simultaneously as a single functional organ or syncytium.
<span>Additional facts:
A test cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring.
Answer:
You'd use it when you wish to see if the one that you think is a homozygous dominant is a purebred, because if you did get a recessive offspring then it proves that the animal is a heterozygous and not a purebred.</span>
1. Red: even without knowing much, just by realizing that red is one of the extremes (think rainbow), we can assume that it is the longest. Also, infrared waves' wavelengths are longer than that of visible light.
2. Electromagnetic radiation: the fact that they have "ray" in the names shows that they are radiation. It's not ultraviolet because that is part of electromagnetic radiation.
3. Photon
Answer:24 feet as the shadow is half the size of the actual object
