Question in English:
The concept of gene flow is demonstrated when a cow is expelled from her herd, joins another herd, and reproduces. When the cow contributes to the gene pool of the new herd, which of these is most likely to increase?
A. Natural selection
B. Genetic variation
C. Environmental suitability
D. Reproductive mutations
Answer:
B. Genetic variation/Variación genética
Explanation:
When an organism from one population enters a new population that does not normally mix, it brings with it its own unique genetic variation.
Its new alleles are introduced into the new population when the cow breeds, enhancing the amount of gene variation in the new herd. This is how gene flow increases variation
Answer:
A
Explanation: You can see that the green colored frogs were once lower than the blue and as time started progressing the green started getting a higher population over the blue, as the blue decreased.
Answer:
from within a follicle of the ovaries
Explanation:
the follicle is found on the outer layer of the ovaries, and with every reproductive cycle several follicles begin ti develop. usually only one oocyte will mature into an egg and be ovulated from the follicle. this whole process is called ovulation.
De-nitrification is the process that removes the useful nitrogen containing compounds from soil. This process is performed by soil bacteria that convert nitrates (NO3) into gaseous nitrogen (N2). When nitrogen is lost from the soil it slows down the proper development of plants growing in that soil.
Farmers are taking important steps to minimize de-nitrification and improve crop production , such as:
Usage of fertilizers:
They use suitable nitrogen containing fertilizers that maintain soil nitrogen as urea or ammonium and slow down de-nitrification. The selection of fertilizer is very important to lower de-nitrification, for example, the usage of urea containing fertilizers is better for controlling de-nitrification than urea containing fertilizers.
De-nitrification inhibitors:
Farmers also use some de-nitrification inhibitors -the chemical compounds which slow down the rate of de-nitrification. These compounds belong to a specific group of chemicals called "Procyanidins" that restrict denitrifying bacteria from converting nitrates (NO3) into gaseous nitrogen (N2). Therefore, they help in improving the growth of crops.
Cover Crops:
Farmers also grow some cover crops after they harvest the main cash crops from land. The cover crops protect and add nutrients to the soil. The cover crops also capture the nitrates from soil and help in slowing down the process of de-nitrification. Therefore, farmers prefer to grow cover crops and increase the growth and yield of crops.
