Describe how continents move across the ocean basins as if they are on a conveyor belt.

1 answer:

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The present continent positions are not the same as their ancient positions. For example, Africa and South America used to be together in the old Gondwanaland. Alfred Wegener noticed the correlation in complementary forms of the coast lines of these two continents and developed the theory of continental drift. But it wasn't until the late 1960's or early 1970's that the mechanism for this movement was discovered in the theory of plate tectonics. Actually, it was shown that the mid-oceanic ridges like the one going through Iceland is where molten rock is welling up from the mantle on a zone of fracturing and the convection currents from this cause the ocean spreading and thus the movement of continents away from each other as in the case of Africa and South America.

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When blood glucose levels rise, the hormone ___ is released from the ___ to convert excess glucose into glycogen, a short-term e

Mariana [72]

Answer:

insulin; pancreas.

Explanation:

An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.

Basically, the endocrine system contributes significantly to the state of homeostasis in the body.

Homeostasis can be defined as a process through which a living organism maintains a steady or stable physical, internal and chemical environment that is ideal to enhance life and proper functionality.

Generally, when the blood glucose levels of a person rise, through an endocrine system, the hormone known as insulin is released from the pancreas to convert excess glucose into glycogen, which is typically a short-term energy storage molecule for the body.

In conclusion, the endocrine system maintain homeostasis by releasing insulin from the pancreas to decrease blood sugar and releasing glucagon to increase blood sugar.

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Abiotic factors one of the many components of an ecosystem . Abiotic factors include, rocks,water, and sunlight . One way that a

Alborosie

Answer:

An ecosystem is biotic, not abiotic.

Explanation:

First, an ecosystem is a biological community of interacting organisms and their physical environment. Second biotic factors are nonliving things whereas biotic factors are living things in an ecosystem you have your producers or plants which then will be consumed by the primary consumers. With the primary consumers feeding the next group of consumers and then the next and then after they die they fertilize the ground allowing the producers to grow as it completes the circle of life.

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Scientists use homologous structures to identify evolutionary relationships. Which is an example of homologous structures?

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Answer:

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Homologous structures compare the same anatomical features in different species. C is correct because it compares the same trait (wings) in different species (dragonfly vs. bat)

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a strand of mRNA has the bases adenine- cytosine- uracil which amino acid corresponds to these bases?

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Answer:

Threonine

Explanation:

Using the amino acid chart, the mRNA strand ACU corresponds to the amino acid Threonine.

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