An unspecialized cell that can give rise to one or more different types of specialized cells, such as blood cells and nerve cells. Stem cells are present in embryos and in various tissues of adult organisms
Answer:
right atrium
Explanation:
as deoxygenated blood enters the vena cava, it flows through the right atrium and right ventricle and leaves by the pulmonary artery and goes to the lung so that the blood can be oxygenated. now the oxygenated blood enters the right atrium via the pulmonary vein and leaves by the aorta.
The correct answer is A.
The use of antibacterial drugs can cause modifications in the genetic material of the concerned bacteria. If the genetic material of the bacteria are modify, that means they have undergone mutation. Because the base sequence of the normal and that of the mutated gene is different, antibiotic will not be able to recognize the bacteria again and thus will not be able to attack it.
C the cell will split into two cells but first it doubles its chromosomes
he correct answer is number one. A chromosome is composed of many genes. A chromosome is referred to as a DNA molecule in an organism's body, which consists of genetic materials. Chromosomes consists of numerous genes within them, in their nucleus and mitochondria, genes are found inside the Chromosomes itself