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WITCHER [35]
3 years ago
8

What is missing from the ecosystem during primary succession

Biology
1 answer:
Kaylis [27]3 years ago
6 0

Answer:

competition

Explanation:

After an ecosystem has been destroyed because of certain catastrophe and all of the space that it occupied is totally cleared and open for overtaking, the primary succession comes in action. When the primary succession occurs, there's no competition, as pretty much everything has been destroyed from the previously existing ecosystem. The pioneers of the primary succession are organisms that do not require a lot to prosper, such as the mosses and lichens. As they start to cover the barren land, little by little they manage to change the composition of the rocks, thus resulting in the formation of the first soils. As that happens, the secondary succession comes on the horizon as now it has conditions for it, so the species from it overtake and replace the species form the primary succession.

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mariarad [96]
The foramen ovale becomes fossa ovalis (closed).
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3 years ago
9. Describe the function of the:<br> a. stomach<br> b. small intestine<br> c. large intestine
tiny-mole [99]

Answer:

The stomach helps to store food temporarily. It also secretes gastric juices that digest food.

Most of the digestive process (digestion and absorption of food) takes place in the small intestine.

The funtions of large intestine are temporary storage of undigested and unabsorbed food, reabsorption of water and minerals, elimination of waste products (faeces) through the anus, helps in antibody production and acid reduction, maintaining a large population of bacteria living inside the intestine which produce gas, vitamin K etc.

Explanation:

The food that entered the stomach mixes with the gastric juices (hydrochloric acid and pepsin ) and get broken down into smaller components.

The partly digested food is then passed into the small intestine where the food is mixed with digestive juices from the pancreas, liver, and intestine and broke it down into smaller molecules (nutrients) which are absorbed into the blood in the small intestine. The inner wall of small intestine has finger-like projections called villi, which contains a network of capillaries and lymphatic vessels. Nutrients are transported to these capillaries and lymphatic vessels from the villi by diffusion. This nutrient rich blood is then pumped through the circulatory system to the other organs.

The undigested and unabsorbed food passes into the large intestine where water and some minerals are reabsorbed back into the blood. The remaining waste products are eliminated through the anus (defecation).  The large population of bacteria living inside the large intestine digest some material and creates gas, vitamin K etc. It has some role in antibody production and acid reduction also.

5 0
3 years ago
Two distinct bands appear in a single lane at the completion of an SDS-PAGE analysis of an unknown protein. Select one: a. These
Bas_tet [7]

Answer:

b. Each band represents a different-sized subunit of a multimeric protein.

Explanation:

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SDS is a detergent that denaturalizes the protein and sets a relation charge size, such as that the motion of the protein in the gel is proportional to its weight. The bigger the protein is, the stronger interaction with the polyacrylamide gel there will be.  The speed of displacement in the electromagnetic field is inversely proportional to the protein size.

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Windy weather during summer season is<br>pleasant, why<br>?​
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Answer:

because it cools you off when its too warm and overall gives a sense of calm

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An 86-year-old client with dementia is being discharged after treatment for a hip fracture. in reviewing the notes, the nurse id
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