<span>Bipedalism is the adaptation which emerged during pre-australopiths so as to become one of the key distinguishing characteristics of our ancestors.
Bipedalism is known as a form of terrestrial locomotion whereby organisms moves by means of its two rear legs or limbs. By freeing their front legs, our ancestors had a benefit like allowing the use of carrying tools.
Walking upright helped the ancestors to be able to see the predators and the preys.</span>
Answer: They are loosely packed so as to allow gas exchange in air spaces to move freely
Explanation: The mesophyll cells of the spongy cells are packed loosely, in order to allow proper and efficient gaseous exchange to take places easily. The large air pocket of the mesophyll cell allow gas exchange between different areas of the leaves. The cells in mesophyll, contains few chloroplast which are generally responsible for photosynthesis. Gas exchange in the mesophyll cells of the spongy layer allows photosynthesis to take place.
In a human female reproductive system, the OUTER FEATURES ARE COLLECTIVELY CALLED THE VULVA. The vulva is the external anatomical structure of the female reproductive system. The opening of the female urethra is also located at the vulva, thus, the vulva also helps in urination in female.
Answer:
A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.
Explanation:
