Answer:
A. Species that remained after the extinction were able to radiate, new adaptations arose, and these adaptations produced the diversity seen today.
Explanation:
When species went extinct they also left niches that could be occupied by "new" species; new places to live, places to be filled in the food web and different relationships to be formed. The wide availability of resources made organisms to radiate leading to a "new" diversity of shapes, sizes, and lifestyles.
B. Species that have gone extinct were able to re-evolve from the ancestors that survived the extinction. If you are extinct you are gone forever.
C. Species that remained after the extinction were unable to speciate. Therefore, the number of species on Earth today is lower than the number of species present just before either extinction. The fossil record proves that species have changed over time and the diversity has changed over the history of Earth.
D. Species that remained after the extinction represented all of the lineages that were present before the extinction event. Therefore, extinction did not change the diversity of lineages. Again, the fossil record is evidence that lineages have changed over the history of the Earth.
Answer: Kidneys are the organs which are present besides the vertebral coloumn behind the peritoneum covered in a mass of fat and loose aerolar tissue along the posterior abdominal wall.
Explanation:
Kidneys are the bean shaped organs which are responsible for excretion and maintaining the pH and elctrolyte balance of the body. They are the part of urinary system.
There are two kidneys in the body.
They lie along the posterioir abdominal wall on the either side of the vertebral column behind spleen and peritoneum. This is because they are called retroperitoneal organs. Left kidney is slighlty higher than the right kidney because liver is present on the right side which pusehes the right kidney a little lower. They typically extend from T12 to L3. Kidneys are covered by a capsule, fibrous mass of tissue and fat and aerolar tissue.
Well, since its about it needing to survive and reproduce in a specific environment, it should be fitness.
Answer:
SECONDARY GROWTH IN DICOT STEM. Dicot Stem: The growth in length of main axis by the activity of apical meristem is called primary growth. Increase in thickness or girth of the axis due to the formation of secondary tissue is called secondary growth.
Explanation:
1. chemoreceptors- tongue
2. mechanoreceptors- skin
3. olfactory receptors - nose
4. photoreceptors - eyes