Plant cells have a cell wall that is very rigid, which forces the cell to shape that way. Animal cells are round because they don’t have a cell wall only a plasma membrane
Answer:
For the photossynthesis there are requirement of cholorplast which is found on the surface of the plant leaves mostly that traps the light and convert light energy to the storage energy or glucose. Leave have larger surface area so the maximum amount of light can be traped for the photosyntheis by the cholorplast present in palisade cells.
Other than this leaves also helps in the gaseous exchange with stomata; small openings, by allowing carbon dioxide and oxygen into the leafe and outof the leave respectively. The veins helps in the transport of the gluscose and nutrition.
Answer:
B. Resource availability sets the limit.
Explanation:
The more resources available, the higher the carrying capacity, the less resources available, the lower the carrying capacity.
For example, take a grassland. Let's say that the grassland can support 100 deers. if there was a sudden drought, causing most of the grass to die, the carrying capacity can drop down to 10. If there was suddenly constant adequate rainfall, and silt was deposited in the land, causing more grass to grow, the carrying capacity can grow to upwards of 125.
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Answer:
The most important hormone involved in controlling sperm production is a steroid called testosterone. This is produced in the testis itself, by the Leydig cells (see Figure 12a). The testosterone is released from the Leydig cells between the tubules, and taken up by the neighbouring Sertoli cells.
