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Degger [83]
4 years ago
15

What were the first cells like

Biology
1 answer:
solmaris [256]4 years ago
5 0

Answer:

The first cells were most likely primitive prokaryotic-like cells, even more simplistic than these E. coli bacteria. The first cells were probably no more than organic compounds, such as a simplistic RNA, surrounded by a membrane.

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An object that is not moving, wants to do what? (Think law of inertia)
dezoksy [38]

Answer:

2. Not move

Explanation:

An object at rest will stay at rest unless acted upon by an unbalanced force.

4 0
3 years ago
In a laboratory investigation, students measured the rate of fermentation in yeast cells. Data was collected by student groups s
tigry1 [53]

"C) The two bars for the maltose would be similar to the bars for sucrose." This is because maltose falls under the disaccharide type of carbohydrateWe appreciate your questions. Please, never hesitate to ask more in Brainly your queries. 
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3 years ago
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Which of the following best describes an effective adaptation of plants commonly found in the rain forest?
Montano1993 [528]
Plants in the rain forest have unique adaptations to help them to thrive in the climatic conditions present there. Temperatures in the rain forest are high all year round. Since tropical rain forests are located around the equator they receive direct sunlight. The leaves of the plants here are waxy to protect them from the direct sunlight. 
Rain fall is high here and it can get up to 4000 mm per year. Leaves are equipped with drip tips to allow for the easy run off of water after a down pour.
The barks of most trees are also smooth to further facilitate the movement of water to the ground. The trees in the forest grow fast and compete with each other for sunlight. The trees grow very tall and very fast so they have specialized roots called buttress roots that can support them. These roots spread out to support tall trees. 
The dense vegetation of the forest prevents much plants from growing under the canopy of the trees. A small number of plant however can survive in this low light environment. The plant that grow under the canopy have large, dark green leaves to make use of the little light that passes through. 

8 0
3 years ago
What is organelle? Please give an example.
miv72 [106K]
Organelles are part of a cell. They make up the cell and make sure it works properly. The way I remember is like this - if we were a cell, our organelles would be our organs. Examples of organelles are endoplasmic reticulum or mitochondria.
5 0
4 years ago
Why do the cells of the digestive system secrete proteolytic enzymes, such as pepsin, in their inactive forms
Kipish [7]

Answer:

In the initial stages of digestion of food, the stomach performs an essential role. Apart from doing churning and squeezing the food bolus, it also discharges an amalgamation of compounds, together called gastric juice. It comprises mucus, water, pepsin, HCl, and intrinsic factor. Of these five constituents, the principal enzyme that takes part in the digestion of protein is pepsin.

It dissociates proteins into amino acids and smaller peptides, which can easily get captivated within the small intestine. This pepsin is released in its sedentary form, or zymogen form called pepsinogen by the chief cells present within the gastric lining. It is released in its sedentary form by the stomach, by this the stomach inhibits the auto-digestion of defensive proteins in the digestive tract's lining.

8 0
3 years ago
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