The answer is Vas deferens
Ecologists are the persons who study the interrelationships between organisms and their environments. Like they research upon the species found in forests or deserts interact with each other and as well as their surroundings.
They test whether a species is occupying its complete fundamental niche or only a portion of it by observing if the species are expanding their range after the removal of a competitor because two species with the same fundamental niche will exclude other competing species.
The answer is letter A. In most organisms cellular respiration usually involves oxygen to produce the most energy. Except in the process of fermentation, where the cells are deprived with oxygen causing it to form bacteria and other forms of organisms within the fermented sample.
The answer is Euglena. Euglena is a genus of single-celled flagellate eukaryotes. It is a large genus of unicellular protists, which have both plant and animal characteristics. All are motile by means of a flagellum. Most have chloroplasts (alga and plant characteristic). Euglenids are believed to descend from an ancestor that took up green algae by secondary endosymbiosis.
