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4 years ago

Which statement best explains why water is an important molecule for living things?

Biology

2 answers:

garik1379 [7]4 years ago

4 0

The right answer is C.

Living beings are made of water!

All living things are mostly composed of water. For example, plants contain between 80 to 85% water and men nearly 70%.

The plants are almost entirely composed of water; It is indispensable to him for:

*transport the mineral elements from the soil

*transport the living matter elaborated in its different parts

*sweat and breathe

Humans and animals are partly made up of water and they use water for their operation, regulating their temperature and disposing of their waste.

jek_recluse [69]4 years ago

3 0

All cell processes take place in a watery environment

Water is the universal solvent and without it life as we know it would not exist.

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Neurotransmitters categorized as inhibitory are expected to _______. A. act independently of their receptor proteins B. close po

Ksenya-84 [330]

The correct option is D.

Neurotransmitters categorized as inhibitory are expected to hyperpolarize the membrane.

At inhibitory synapses, release of neurotransmitters causes inhibitory postsynaptic potentials or IPSP, which is a hyperpolarization of the presynaptic membrane.

Actually, depolarization and hyperpolarization occurs on neuron when an ion channel in the membrane open or close which can alter the ability of certain types of ions which enter from or exit out of the cell.

Neurotransmitters which is inhibitory have inhibitory effects on the neuron as it means they can decrease the possibility that the neuron will tend to fire an action. Modulatory neurotransmitters can also affect various neurons at the same time which results in the influencing effects of other chemical messengers.

Inhibitory neurotransmitter somehow decreases the action potential of the neuron. When the action potential falls below a certain level which is called threshold potential, the neuron will not be able to generate action potentials and thereby unable to exit the nearest neurons.

So, neurotransmitters are in general expected to hyperpolarize the membrane in some extent.

Learn to know more about what an inhibitory neurotransmitter does on

brainly.com/question/16345146

#SPJ4

6 0

2 years ago

Proteins may be classified according to their three-dimensional shapes. Determine whether the following examples and description

m_a_m_a [10]

Answer:

-often function as enzymes or transport proteins ⇒ globular proteins

-peptide chains arranged in long strands, or fibers ⇒ fibrous proteins

-peptide chains highly folded into spherical shapes ⇒ globular proteins

-keratins ⇒ fibrous proteins

-hemoglobin ⇒ globular proteins

-water-soluble ⇒ globular proteins

-collagens ⇒ fibrous proteins

-insoluble in water ⇒ fibrous proteins

-generally function in structure and support ⇒ fibrous proteins

Explanation:

Fibrous proteins are composed by large polypeptide chains which interact each other and form large structures. They have water insoluble and have structural and protection functions- they are components of cells and tissues. Examples are: collagen, fibronectin, keratin, elastin, actin.

Globular proteins have a spherical compact structure in which hydrophobic aminoacids are buried inside the structure and hydrophilic aminoacids (which can interact with water molecules) are exposed to the exterior medium. For this, they are water soluble. They have often transport and catalytic functions. For example: hemoglobin, mioglobin, albumin, enzymes in general.

7 0

3 years ago

Which part of the female reproductive system produces ova?

ikadub [295]

The ovary is the part of the female reproductive system that produces ova.

The ovary is an organ located in the female reproductive system that produces female reproductive cells or ova. The ovary is often paired and are firm, smooth and about the size of an almond. The ovaries are held by a membrane next to the uterus on both side of the lower abdomen. When an ovum is produced, it moves into the uterus through the fallopian tube, where it may be fertilized by a sperm. The ovary also secretes various hormones such as estrogen and progesterone that perform major roles in the menstrual cycle and fertility.

5 0

3 years ago

Read 2 more answers

Explain how modern classification is different from linnaeus methods, and why scientists changed it

SCORPION-xisa [38]

The answer is that the criteria of classification change with the improved understanding of organisms around us. During the time of Aristotle, not much was known about the living organisms. So, he classified them as he observed. Plants were classified into herbs, shrubs and trees; very much like what’s taught to a second grade student. Animals as Enaima and Anaima based on the presence or absence of RBCs. After him, Carolus Linnaeus tried his hand over classification. He came up with the 2 kingdom classification: Plants and Animals. He considered only a set of morphological and physiological criteria to decide the kingdom to which an organism belongs. It includes presence of cell wall, mode of nutrition, contractile vacuole, locomotion and others. Based on these criteria, he included widely differing organisms into a single kingdom, for example, fungi, bacteria, algae, and higher plants were included into plant kingdom just because they have cell wall as a common aspect. Then came, Ernst Haeckel, who came with a third kingdom of Protista to include unicellular organisms. Copeland gave a 4 kingdom classification segregating unicellular organisms into 2 separate kingdoms based on their nuclear structure. R.H. Whittaker came next introducing the most accepted 5 kingdom classification system. You should understand one thing that man’s knowledge of classifying organisms improved with the improving technologies available to him, which he exploited to very effective extent. Carl Woese gave the 6 kingdom classification and 3 domain system based on the 16S rRNA sequence.

Our understanding of organisms around us is improving day by day and the system of classification will also change further in pace with the improvement in technology.

I hope this helps! :D]

~ Kana ^^

8 0

3 years ago

Name the animal used as a beast of burden in the andes

satela [25.4K]

Answer;

The llama and the alpaca were used as beasts of burden in the Andes.

Explanation;

-A beast of burden is drought animal that carries or pulls heavy loads, such as a donkey, mule, llama, camel etc.

-The Andean animal used as a beast of burden is an Alpaca and the Llamas. They are docile, fluffy animals that can withstand the cold of the mountains. As such, they make excellent work animals.

-Male llamas have been been used as beasts of burden in the Peruvian and Bolivian Andes ranges for more than 4000 years.

8 0

3 years ago