Protostomes develop a mouth first and then an anus. This is the difference between protostomes and deuterostomes.
In protostome development, there is a spiral radical and indeterminate cleavage. The blastopore becomes the mouth and the coelom forms from the mesoderm.
In deuterostomes development, radial and indeterminate cleavage takes place. The blastopore is the new anus and the coelom forms from budding off the wall of the archenteron.
Egeria densa is an aquatic plant which has developed different means of carrying out photosynthesis under conditions of low carbon dioxide. During the process, the plant generate low pH at the leaf surface during high light intensity and this acidification shift the process equilibrium towards carbon dioxide which will then diffuse into the cell through passive diffusion.
Thus, if the student place the plant inside her fresh water tank, the plant will increase the carbon dioxide content of the water, which will lead to an increase in pH and the increase in pH will negatively affect the fish.
Answer: 1 : 2 : 1
Explanation:
Carbohydrates were originally referred to as 'hydrates of carbon' because they contained hydrogen, oxygen and carbon.
Sugars, starches, cellulose, and gums all belong to the class of carbohydrates.
They are represented by the general formula Cx(H2O)y, where x and y must be whole numbers.
Thus, Carbohydrates contain carbon, hydrogen and oxygen in the ratio 1 : 2 : 1
Answer:
The average density of deer in 1923 was 1 deer per 8 acres
Explanation:
Given -
In 1923, the population of deer rose to 
The density of any species is equal to total population divided by total area of the land in which this population is residing.
Where d represents the density
P represents the population and
A represents the area of land
Substituting the given values in above equation, we get -
Thus, the average density of deer in 1923 was 1 deer per 8 acres
