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zubka84 [21]
3 years ago
15

Answer the questions or write definitions of the first 20

Biology
1 answer:
S_A_V [24]3 years ago
7 0

Answer:

1. Hypothesis:

a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation

2.Ocean systems:

The ocean is a global, interconnected system that has regions, or basins. Water and ocean life move between these basins and up and down the water column. Ocean water circulates around the globe through ocean currents that are either wind-driven currents or density-driven currents.

3.Proteins:

a class of nitrogenous organic compounds which have large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, etc., and as enzymes and antibodies.

4.Saturated fat molecules:

Saturated fat, a fatty acid in which the hydrocarbon molecules have a hydrogen atom on every carbon and thus are fully hydrogenated. (By way of comparison, the hydrocarbon molecules of unsaturated fats have two carbons that share double or triple bonds and are therefore not completely saturated with hydrogen atoms.)

5.Enzymes:

a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.

6.Prokaryote:

a microscopic single-celled organism which has neither a distinct nucleus with a membrane nor other specialized organelles, including the bacteria and cyanobacteria.

7.Eukaryote:

an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaea.

8.Hemoglobin:

a red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a haem group.

9.Active Transport:

the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.

10.Phospholipids:

a lipid containing a phosphate group in its molecule, e.g. phosphatidylcholine.

11.Facilitated diffusion:

Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.

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According to the gate control theory of pain, how do gate neurons inhibit pain neurons? select one:
harkovskaia [24]

The gate control theory of pain states that the experience of pain is dependent on the complex interaction of the central and the peripheral nervous system. This theory was given by Ronald Melzack and Patrick Wall.

Usually, when a person experiences pain, the neurons transmits the message from the area of damage along the peripheral nervous system to the spinal cord and the brain.  The gate control theory suggests that the neurons encounter the 'nerve gates' while transmitting the pain messages in the spinal cord. These opening and closing of these gates is dependent on the multiple factors.  

The basket cells are the multipolar, inhibitory interneurons . Endorphins are the neuropeptide and the peptide hormones, which are secreted by the central nervous system and the pituitary gland. These structures have no relation with the transmission of the pain.

The hyperpolarization of the neurons by the opiate receptors resulting in the release of the substance P, which is a neurotransmitter involved with pain.

Hence, the correct answer is 'by releasing substance P'.

5 0
3 years ago
Which process is most responsible for the increase in early Earth's atmospheric oxygen levels?
Alik [6]
Which process is the most responsible for the increase in early Earth's atmospheric oxygen levels?

Photosynthesis

8 0
3 years ago
True and False:
romanna [79]

Answer:

1. Falso

2. Falso

3. Verdadero

4. Falso

5. verdadero

Explanation:

1. Las células de los animales, las plantas y los hongos son eucariotas

2. Los hongos se reproducen sobre todo por medio de esporas

3. cerevisiae se reproduce tanto asexual y sexualmente levaduras se reproducen asexualmente mediante un proceso conocido como gemación.

4. La tinción de Azul de lactofenol se emplea para observar hongos.

5. Los hongos pueden ser unicelulares o pluricelulares. Las levaduras son hongos unicelulares

3 0
2 years ago
Number 23 ASAP please
inn [45]

Answer:

Nitrate and phosphate levels rise at a rapid rate

Excessive Plant growth and algal blooms cover the surface of the pond, blocking out sunlight.

Underwater plants begin to die due to lack of photosynthesis, which reduces the amount of dissolved oxygen in the water. Animals also begin to die due to less plants available for food.

Explanation:

5 0
3 years ago
Do you think humans have a moral obligatie to preserve the habitate of the chimp.​
Oksanka [162]
Yes humans do have the obligations of preserving the habitats of chimpanzee as it is considered as an endangered species. Most of the human practices such as tree logging, environment pollution, exploitation of animals and others has led to many species being endangered to extinction.
4 0
3 years ago
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