Answer:
Certain cell organelles are present only in plant cells like chloroplast and certain only in animal cell like centrioles.
Explanation:
The concept can be explained in three stages:
- <u>Organelles only in plant cells</u>- <em>Chloroplast</em> is an organelle which is helpful in photosynthesis. Since animals don't perform photosynthesis, they don't need it. Plant cells also have a <em>cell wall</em> on top of a cell membrane.
- <u>Organelles only in animal cell</u>- <em>Centrioles</em> are present in animal cells which help in movement through structures like <em>flagella and cilia.</em>
- <u>Organelles present in both plant and animal cells</u>- <em>Ribosomes, nucleus,mitochondria, golgi complex, cell vacuoles, lysosomes</em> are present in both plant and animal cells.
When meditation is done properly, brain waves change to include more theta waves.
<span>Theta waves are more active when the thinking mind transitions to the meditative mind. Theta waves represent a deeper state of awareness with stronger intuition. During meditation, those waves are the most abundant in the frontal and middle parts of the brain.</span>
Beavers are descendants of land-dwelling rodents similar to rats. The beavers however have adapted their body shape to live in water bodies like ponds and lakes. This can be hypothesised by saying that the early rodents or the ancestors of beavers were forced to find food in the waters. They lacked the flat tail and the webbed feet. With time the need to increase their ability to catch fishes and floating insects, the rodents with flatter tail and a bigger flat webbed feet gradually evolved. The rodents with flatter tails and webbed feet became adjusted to the life on water and became the modern day beavers.