Animal cells are a usual example of a eukaryotic cell, enveloped by a plasma membrane, and comprising a membrane-bound nucleus and organelles. Like the cells of plants and fungi, they do not exhibit cell wall.
The labeling in the mentioned diagram is:
A. Rough endoplasmic reticulum
B. Cytoplasm
C. Smooth endoplasmic reticulum
D. Nucleolus
E. Nucleus
F. Mitochondria
G. Golgi apparatus
H. Lysosome
I. Plasma membrane
The Golgi apparatus functions closely with the rough endoplasmic reticulum. When a protein is formed in the rough endoplasmic reticulum, then the formation of transition vesicle takes place. This vesicle or sac floats via the cytoplasm to the Golgi apparatus and is then absorbed. From there, the vesicle travels to the membrane of the cell and the molecules are then discharged out of the cell.
Answer:
Limpets
Explanation:
Since the arrows represent flow of energy, and there is no path of energy from fish to limpets, limpets won't be affected at all.
Answer:
Therefore, a global zoonotic disease surveillance system to reduce the emergence of zoonotic diseases in humans and to help detect other livestock diseases early could help to prevent the staggering economic losses associated with zoonotic disease outbreaks. So, yes I would say that they are very important to study.
Explanation:
Answer:
- Interruption in the genetic flow between separated groups
- The emergence of new mutations in each of the groups, and their accumulation in time. Slow and gradual differentiation between populations.
- Genetic divergence by natural selection and reproductive isolation
- Prezigotic isolation mechanisms
Explanation:
Allopatric speciation consists of the geographic separation of a continuous genetic background that can give place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate populations, or geological events. In this speciation, some barriers impede genetic interchange, or genetic flux, as the two new groups that are separated can not get together and mate anymore. These barriers might be geographical or ecological.
The process of allopatric speciation involves different steps that affect organisms:
- The emergence of the barrier.
- Interruption in the genetic interchange
- The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation.
- Genetic divergence by natural selection and reproductive isolation makes it impossible for the two groups to mate even if the barrier disappears.
- Prezigotic isolation mechanisms will be favored by selection if occurs a secondary contact between the new species in formation.
Water molecules consist of 2 Hydrogen and 1 Oxygen atom. They are bonded by a polar covalent bond, meaning the electrons shared by the covalanet bonds are not evenly distributed. Oxygen is more electronegative than Hydrogen and will pull the electrons from its bonds with Hydrogen closer to itself. Thus results in a partial positive dipole on the Hydrogen of the water molecule and a partial negative dipole on the Oxygen of the water molecule. These partial charges allow water to hydrogen bond with one another through a process called cohesion.
