Answer:
A. A resource that is so scarce (in restricted quantity) that it limits the size of a population is called a limiting factor. Any single resource can be a limiting factor to a population size. For example, the amount of water available can affect the number of plants that can grow in an area.
Answer:
e. PhoU keeps PhoR bound to the phosphate transporter protein Pst
Explanation:
PhoU is a membrane protein known to regulate the transport of phosphate (Pi) between cellular compartments. It has been discovered that mutations in this protein cause lethality because the cell becomes incapable of controlling the intracellular levels of Pi, this being toxic for the cell. PhoR is a histidine kinase/phosphatase. When the Pi level is considered to be a limiting factor, PhoR autophosphorylates at a histidine residue and then donates its phosphoryl group to PhoB. On the other hand, when the Pi level is high, this protein removes the phosphoryl group from phospho-PhoB. Finally, the Pst is a signal transduction protein that acts as a transporter capable of switching its conformation during the transport of PI.
<span>It is the superior surface of the medial and lateral condyles. The medial condyle is a projection on the lower extremity of the femur, and the lateral condyle is the other projection on the lower extremity of the femur. The medial condyle is larger than the lateral as it bears more weight from the body.</span>
Answer:
- According to the cladogram what separates rabbits/primates from crocodiles is that the former have a divergence before the latter and are viviparous.
- The organism that is most closely related to rodents and rabbits in the cladogram is the primate.
Explanation:
The cladogram (see image) shows the evolutionary line that several animal species have followed. According to this, the following conclusions can be established:
- <em>Both primates and rabbits/rodents are mammals, with intrauterine development of their offspring, while crocodiles and birds are oviparous, which represents a </em><em><u>divergence in their evolution</u></em><em>.</em>
- <em>The species most related in the cladogram to rabbits / rodents is the primate, since they share several characteristics in common, such as being mammals, skin covered with hair and being viviparous.</em>
Characteristics such as these are what allow the classification of different animal species.
