The alula is a small structure that is found on birds. It is located at the joint between the hand wing and the arm wings of birds and it is the freely moving, first digit of a bird's wing. It is normally used by birds in slow flight. In humans, the structure that is comparable to the alula is the thumb.
Answer:
Approximately it will consume 55% of the total time in the interphase i.e. 800 minutes.
Explanation:
The time required in different phases are as follows:
It takes 800 minutes for interphase
It takes 400 minutes for prophase
It takes 120 minutes for metaphase
It takes 80 minutes for anaphase
It takes 40 minutes for telophase
Total -- 24 hours
From this it can be concluded that around 55% of the time spent in the interphase, whereas only 28% in the prophase, 8% time for metaphase, 6% Anaphase and 3% Telophase. This is all happens in the onion cell but in case of the human cell, prophase it takes about 15 min, in prometaphase it takes 15 mins, metaphase takes in about 20 min, Anaphase takes minimum of 3 min and telophase is about and cytokineses are about less then 10 mins.
Student 1’s methods would be more accurate, because the student would control more factors. Only one variable at a time (either temperature or acidity) would be tested on each group of worms. On the other hand, Student 2 is testing both factors on all the worms, which could make the results unclear.
The dissolved sugar molecules is distributed evenly all over the solution.
The equilibrium is reached through diffusion. Diffusion is the net movement of molecules and atoms from a high concentration to area of lower concentration. This is considered as the result of the movement of molecules. Diffusion is driven by a gradient until the molecules are distributed randomly and uniformly all throughout the solution. This can be manifested by perfume sprayed in the air, dye dropped in a water. The distinguishing features of diffusion is that particle move randomly and in uniform pattern.
Answer:
The correct option is d). The process is called interstitial growth.
Explanation:
The cartilage is composed of chondrocytes, which are located in small spaces called lacunae. Its function is to synthesize the extracellular matrix of cartilage. Its growth occurs through two processes: appositional growth and interstitial growth. When chondrocytes in lacunae divide and form new matrix, it leads to an expansion of the cartilage tissue from within, the process is known as interstitial growth, this happens because the young chondrocytes divide mitotically, forming a group called isogenous, while forming the matrix, each one separates, creating its own lacunae. As a result of the increase of chondrocytes and the secretion of the new intercellular matrix, it causes the cartilage to grow (expand) from within.
