Answer:
Hematopoietic stem cells
Explanation:
These hematopoietic stem cells gives rise to the other blood cells in the bone marrow and the process is known as hematopoiesis. It occurs in the red bone marrow.
Bone marrow is the place where new blood cells are produced. It is the tissue comprising center of large bones and contains two types of stem cells: hematopoietic and stromal.
The strong gravity keeps the plantets from escaping so they have thick atmospheres
<span>A mutually dependent relationship exists between chloroplast and mitochondria in the plant cell. Photosynthesis, which occur in the chloroplasts,generates the sugar and oxygen gas that are used in mitochondria for cellular respiration. It generates carbon-dioxide which in turn is used as a carbon source for the synthesis of sugars during photosynthesis.</span>
Answer:
star
Explanation:
For a brief time, a supernova can shine as brightly as an entire galaxy, but will fade again over a matter of days. The explosion occurs when a high-mass star finally runs out of nuclear fuel. ... The resulting shock wave creates an expanding shell of gas and dust called a supernova remnant.