Explanation:
The giant landmass described by Wegener in his continental drift hypothesis has broken down into different slabs and they have moved to new positions. The giant landmass is called Pangaea. Pangaea is a supercontinent believed to have produced the continents today.
- The break up of the supercontinent started about 175million years ago.
- Today, it is understood that the concept of plate tectonics provides an insight into how the supercontinent have broken down and migrated to their present position today.
- Plate tectonics also provides a mechanism that provided motion for the plate.
- Wegener from his observation suggested that the continent could easily fit into a single supercontinent like the pieces of a puzzle.
- He also suggested evidence from across the various continents to back up his claim.
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Answer: True.
Neonates haemoglobin level increase significantly during and following birth.
Explanation:
Neonates refers to a new born baby.
Haemoglobin is the protein in red blood cells that transport oxygen to the blood.
Haemoglobin continue to rise until two hours after birth this is because the infants require haemoglobin with high oxygen affinity which is needed for tissue oxygen and the baby might need to maximize oxygen intake following birth because its need to breath in air for respiration .
Answer:
Movement of RNA molecules from the nucleus to cytoplasm.
Explanation:
Cytoskeleton are as important for cell as skeleton for us. It perform various functions for the cell such as;
- Maitain the cell shape.
- Provide movement to cell.
- Provide movement for organelles
- Help in cell divsion.
The Cytoskeleton is made up of protein and three type of fibers.
- Microfilament
- Intermediate filament
- Microtubules
