Answer: all cacti in the area.
Explanation:
Population is the total number of organisms of the same specie present in an given area.
Based on the given area (desert), all the cacti, best describes population.
Note that whenever different species (lizards, owl etc) are considered like in options B, C and D, you are referring to a community
Thus, all cacti in the area are considered as population.
Might use the bathroom a lot to get rid of most of the blood because urine is water and if the water changes, the blood changes, so urine might happen if you want to get rid of all of the blood.
Answer:
During their childhood, kids learn about the world that surrounds them when going through 3 different phases regarding their body parts, and taking contact with their family and school; when puberty strikes, the learning shifts towards the teen's peer group and their chosen role models to create new patterns in behaviour and find themselves (adolescence). Once the individual enters adulthood and establish his/her personality, can form strong and intimate relationships with friends and romantic partners (transitional adulthood). When reaching the middle years, the person needs to contribute to society in some way to feel productive, like raising children or helping his/her community. Finally, during the older years, humans tend to reflect on their lives and accomplishments to develop a sense of either integrity or despair.
Answer:
They are opened either by the binding of ligands or by changes in electric potential across the membrane
Explanation:
Ion channels are the integral membrane proteins that form pores or holes for the transport of specific ions, such as potassium ions (K+), Na+, etc. Most ion channels are selective and allow only a single type of ion to pass through. These ion channels facilitate the diffusion of ions down the concentration gradient and do not require ATP.
Ion channels are mostly gated. Some ion channels open in response to change in the concentration of ions and electric charges across the membrane. Some ion channels open and close in response to the binding of specific molecules called a ligand. For example, binding of two molecules of acetylcholine to the receptor on the motor endplate of a neuromuscular junction opens an ion channel in the ACh receptor through which Na+ can flow across the membrane.
Last one: blood going to the cells receives co2
