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2 years ago

Describe the general trend of this graph

Biology

1 answer:

Mumz [18]2 years ago

5 0

Answer:

Point A (8000 BC): the human population was very small compared to nowadays

Point B (approx. 1350 AD): the human population underwent a drastic reduction in size

Point C (1750-2020 AD): the human population is undergoing an exponential growth

Explanation:

The emergence of agricultural practices during the early Holocene period 10000 thousand years ago enabled humans to remain in one place permanently (sedentism) and increased food resources, which had a positive impact on population growth. During this period (Point A), it is estimated that the world population was between one and ten million people. During 1345-1351 AC (point B), the world suffered the "Black Death", one of the most devastating pandemics that led to the death of up to 70–200 million people in North Africa, Europe and Asia, thereby causing a drastic reduction in human population. Moreover, scientific and technological advances in the last 250-270 years (i.e., since the industrial revolution to nowadays, point C) led to an exponential increase in the human population. Nowadays, the current world population is 7.6-7.8 billion people.

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DNA strands are held together by hydrogen bonds. What characteristic of hydrogen bonds make them work well during DNA replicatio

garri49 [273]

Hi pls mark it as the brainliest
option b is the ans "they can be easily brokren "

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2 years ago

Amino acid catabolism involves the breakdown of 20 amino acids all of which contain nitrogen but have different carbon skeletons

Alex Ar [27]

Answer:

The overall strategy employed in the catabolism of the carbon skeletons of the 20 amino acids is conversion to citric acid intermediates such as acetyl-CoA

Explanation:

The breakdown of the different carbon skeletons of the 20 amino acids is strategically channelled towards the citric acid cycle. Six major products are obtained in the catabolism of the carbon chain of amino acids and these products all enter the citrc acid cycle. The six major products are acetyl-CoA, α-ketoglutarate, succinyl-CoA, fumarate, oxaloacetate and pyruvate.

The amino acids that are broken down completely into acetoacetyl-CoA and/or acetyl-CoA are said to be ketogenic since they yield ketone bodies in the liver.

The amino acids that are broken down into α-ketoglutarate, succinyl-CoA, fumarate, oxaloacetate and pyruvate can be converted to glucose and glycogen and are said to be glucogenic. Pyruvate can further be converted to either acetyl-CoA or oxaloacetate. Some amino acids though are both ketogenic and glucogenic, e.g. tryptophan, threonine.

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2 years ago

Ariel drew a diagram to compare two human-induced environmental changes.

qaws [65]

Answer: A

Explanation:

Because both introduce substance that harm organisms. All the other ones are wrong because eutrophication is a natural process that involes little to no human interference .

7 0

3 years ago

Read 2 more answers

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.

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3 years ago

Q 16.1: The cerebral cortex is required for A : subconscious detection of environmental changes B : conscious interpretation of

dedylja [7]

Answer:

Conscious interpretation of sensations.

Explanation:

Cerebral cortex consists of the outer layer of the cerebrum present in the brain of the humans. Longitudinal fissure divides the cerebral cortex into the right and left cerebral hemisphere.

The cerebral cortex is involved in the senses information. The conscious interpretation of the sensation is required in the cerebral cortex and contains large number of sensory innervation.

Thus, the correct answer is option (B).

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3 years ago