Answer:
This question lacks options, the options are:
A) symbiosis
B) ecosystem
C) community
D) population
E) biosphere
The answer is D) Population
Explanation:
In ecology, a population refers to the group of living organisms of the same species living together in the same habitat and have the ability to interbreed i.e. mate and reproduce fertile offsprings.
In this question where many sandhill cranes (large flying birds) were observed in their habitat. In addition to the fact that the group of sandhill cranes are found to be living together, they were also observed to be reproducing with other members of the population. This was portrayed by the observation of two sandhill cranes hopping up and down around their bright orange baby. This shows that members of the population are capable of mating and reproducing fertile offsprings.
This observation i.e group of sandhill cranes living together and interbreeding, best shows that the observed is a POPULATION of sandhill cranes.
The main threats to river basins (the entire area drained by a river) continue to mount.
Construction of large dams and physical alterations of river flow by straightening and deepening of river courses.
This disrupts the natural flooding cycles, reduces flows, drains wetlands, cuts rivers off from their floodplains, and inundates riparian habitats, resulting in the destruction of species, the intensification of floods and a threat to livelihoods in the long term.
It has increased chemical reactivity and it is primed to do cellular work.
Answer:subarachnoid space.
Explanation:Explanation: the cerebrospinal fluid is produced by the ventricles of the brain.it is the circulating fluids that surrounded the brain and the spinal cord.
These fluid supplies the brain and spinal cord with nutrients,removes wastes and protects spinal from trauma.
The lumps puncture is usually done to :
To determine any infection in theCNS (infalamtion of the brain amd spinal cord(meningitis).
To determine if there is bleeding in the CNS.
To Diagnose brain tumor or viral infection.