Answer: B.) To synthesize and isolate proteins for secretion or for use in the cell.
Explanation:
The fact that choanoflagellates and collar cells of sponges resemble each other support the inference that chonoflagellates and sponges are sister groups.
Choanoflagellate are single -celled aquatic flagellate with single flagellum surrounded by a collar of microvilli. In addition choanoflagellate have a long interested evolutionary biologist due to their striking resemblance to collared cells of sponge.
The following option are correct:
1. There will be interspecific competition between foxes and tigers.
Competition for food between animals of different species is called interspecific competition while that between the same animal species is called intraspecific competition.
2. The energy received at the tropic level of carnivores will be less than the usual amount.
The energy received at the trophic level become reduced because the amount of food available for the carnivores has been reduced.
3. There will be decreased biomass at the trophic level of carnivores.
Decrease biomass will occur at the trophic level of carnivores because, those carnivores that can not survive the food reduction problem will die off.
C, mitochondria. Mitochondria are the powerhouses of the cell and produce energy for the cell.
1- Pyloric sphincter
2-Duodenum
3- Bile duct
4-Pancreatic duct
5-Esophagus
6-Lower esophageal sphincter
7-Fundus of stomach
8- Cardia
9-Body of stomach
10-Pyloric part
The <span>esophagus(5) connects to the stomach.</span>
<span> The food passes,from the pharynx, to the esophagus, to the stomach. This process is aided by peristaltic movements done by esophagus muscles.
This organ contains two sphincters:</span><span>the upper and the lower esophageal sphincter.
</span>The stomach is divided into four parts:
<span><span>1-The cardia (8) - this part is connected to the esophagus and its where the epithelium changes from stratified squamous to columnar.
In this region is the lower esophageal sphincter (6).
</span>2--The fundus(7)- It's formed by the upper curvature of the stomach.
3- the body(9)- is the main part; and the biggest
4-The pylorus/</span><span> Pyloric part (10) - is the lower region. This part is connected to the small intestine, the duodenum. In this region there is a </span>
strong ring of muscle called the (<span>1) Pyloric sphincter.
In the first part of the duodenum there is a connection with a duct that comes from the pancreas -4-</span>Pancreatic duct .
There is another duct that ends in the duodenum called- <span>Bile duct, that caries bile to digest fats.</span>
