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laila [671]
2 years ago
7

What is mechanical digestion? Describe the first stage of mechanical digestion.

Biology
2 answers:
Mrrafil [7]2 years ago
6 0

Answer:

Mechanical Digestion

The large pieces of food that are ingested have to be broken into smaller particles that can be acted upon by various enzymes. This is mechanical digestion, which begins in the mouth with chewing or mastication and continues with churning and mixing actions in the stomach.

Explanation:

son4ous [18]2 years ago
3 0

Answer:

Mechanical digestion is the physical act of breaking down the food by non-chemical means. 

Mechanical digestion begins in your mouth with chewing, then moves to churning in the stomach and segmentation in the small intestine.

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Match each of Darwin's ideas to the earlier scientist whose work helped Darwin develop the idea.
mamaluj [8]

Answer:

Lamarck:

The inheritable traits of species may change over time.

Malthus:

In every species in nature, some individuals survive while may others die.

Hutton, Lyell:

The environment of organisms may change over time.

Explanation:

Darwin's revolutionary ideas were influenced by a number of scientists and thinkers of the time:

Jean Baptiste Lamarck:

A botanist and zoologist, Lamarck, for, the first time, proposed the idea of evolutionary changes or adaptations in organisms in response to changes in the environment. He introduced the concept of inheritance of acquired characters.

Thomas Malthus:

Thomas Malthus was not a biologist, but an economist who proposed the ideas that at the rate of the current population growth, human population would eventually suffer from famine and starvation.This would lead to the deaths of the weakest of the population. This idea inspired Darwin to formulate the idea of "the survival of the fittest".

Charles Lyell and James Hutton:

Charles Lyell and James Hutton were famous geologists who greatly influenced Darwin with their theories about the beginning and evolution of the Earth. Charles Lyell proposed that the present state of the Earth was a result of small, gradual changes. James Hutton theorized that the processes that too place at the beginning of the Earth were still in progress.

Lyell and Hutton's work paved the way for the formulation of the theory of natural selection.

6 0
3 years ago
25. Which one of the following epithelial tissues lines blood capillaries?
Wittaler [7]
Answer: I think it’s D. Pls don’t bash me if it’s wrong
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2 years ago
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It is the CELL WALL that the bacteria lacks
8 0
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andreev551 [17]

Answer:

b

Explanation:

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If there are 1000 units of energy available at the producer level of this energy pyramid how much energy will be passed to the p
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I'm pretty sure that each level decreases the amount of energy by a factor of 1/10 so for primary consumers there would be 100 units of energy.

7 0
3 years ago
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