Answer:
All cells arise from pre existing cells.
Explanation:
one of the principles on the cell theory states that all cells came from pre existing cells . The two cells are parent cells who are big enough to undergo mitosis. The 4 cells made out of this event are daughter cells .
Answer: Option D )Males have two different chromosomes.
Explanation:
The human males have two different chromosomes known as the XY- chromosome. Hence, a human male child receives a Y chromosome from his father with XY, and a X chromosome from his mother with XX.
Females, on the other hand have similar chromosomes (XX-chromosome), each X received from each parent.
Thus, the XY-chromosome in human males make for two different chromosomes.
Answer:
Primitive neuroectodermal tumor (PNET)
Explanation:
They usually occur in early childhood but may become symptomatic in adult life. In children, they commonly occur in or near a spinal fluid sac known as the fourth ventricle and are called medulloblastomas.
The Grizzly Bear! it's also on the endangered species list now.
Food webs is the flow of energy from one living thing to another
