The cells present in the tail of the tadpole undergo a programme cell death. This is made possible when the organelles called lysosomes present in the cells break open to cause the breakdown and digestion of all the components of the cells. The lysosomes are break open only when the cells receive a signal from their neighbouring cells to undergo apoptosis, a process where the cell kills itself.
I think it’s D because less carbon would normally be produced in the absence of sunlight. Also, less energy would be present if no sunlight is there
The reaction speeds up because the enzyme lowers activation energy, making it faster than if the reaction had to take time to gain activation energy on its own. The enzyme basically lessens the time it needs to take to gain energy
Hope this helps!
Biology > Cell biology > Passive transport
There are different types of transport in the cell that can be classified into two groups: passive transport (which does not require energy) and active transport (which requires energy because it goes against the concentration gradient).
Diffusion is a type of passive transport and it does not require energy, it can be divided into simple diffusion (molecules pass through the membrane without the help of any channel) and facilitated diffusion (molecules pass through the membrane with the help of a protein channel).
Facilitated diffusion will transport certain molecules and simple diffusion others. Larger, polar and charged molecules will need help to cross the membrane, so they will do so by facilitated diffusion. Therefore, the answer is D.
