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Answer: The answer is A and D

Explanation:

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Two statements that describe evidence that directly led to the development of the theory of plate tectonics? a) Sonar confirmed the presence of mid-ocean ridges. d) Seismic data showed that most earthquakes and volcanoes occur where crust is being formed or destroyed.

According to this theory, the earth's surface is separated by plates that move above the molten mantle. Over the plate borders, these plates interact with one another, causing friction.

Seismic surveys provide a scan of the earth's subsurface using reflected sound waves.

By knowing the speeds at which seismic waves move through rocks at various places and depths, we can learn about geologic formations on the earth. and describes the way an area will tremble during an earthquake.

Hence, options (a) and (d) are correct.

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Answer:

A. circulatory

Explanation:

Answer:

yes this should be correct

Explanation:

Answer:

you are right

Explanation:

The most difficult property of a soil to modify is fertility, while the easiest property to modify is texture.

Soil  is the surface part of the earth's crust, biologically active, which comes from the disintegration or physical or chemical alteration of the rocks and the residues of the activities of living beings that settle on it.

Some of the soil properties are:

The easiest property to modify of the floor is the texture because if we want a more rigid or softer floor we can replace it with any material that is available for that purpose. However, this does not guarantee other properties such as fertility, salinity, good pH, among others.

On the other hand, the most difficult soil property to modify is fertility, since this property is the result of very specific physical and chemical processes. For example, we cannot modify the fertility of the soil of a desert.

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Answer:

Ways in which people positively affect ecosystems around the world include Recycling. Establishing wildlife preserves and parks. Creating green, open space laws.

Explanation:

Answer:

water

Explanation:

Macromolecules contain a lot of atoms,whereas the water molecule contains only 3

Answer:

It occurs in the green tissue.

Explanation:

they are concentrated particularly in the parenchyma cells of the leaf mesophyll.

Answer:

Photosynthetic cells contain special pigments that absorb light energy. Different pigments respond to different wavelengths of visible light. Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly.In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle. In electron micrographs, thylakoid membranes look like stacks of coins, although the compartments they form are connected like a maze of chambers. The green pigment chlorophyll is located within the thylakoid membrane, and the space between the thylakoid and the chloroplast membranes is called the stroma (Figure 3, Figure 4).

Chlorophyll A is the major pigment used in photosynthesis, but there are several types of chlorophyll and numerous other pigments that respond to light, including red, brown, and blue pigments. These other pigments may help channel light energy to chlorophyll A or protect the cell from photo-damage. For example, the photosynthetic protists called dinoflagellates, which are responsible for the "red tides" that often prompt warnings against eating shellfish, contain a variety of light-sensitive pigments, including both chlorophyll and the red pigments responsible for their dramatic coloration.

Photomicrographs of chloroplasts with structures labeled are shown alongside a simplified illustration of a photosynthetic cell with a prominent chloroplast. A portion of the chloroplast illustration is depicted enlarged next to the cell to show the structure of a granum, which consists of stacked thylakoids.

Figure 4: Diagram of a chloroplast inside a cell, showing thylakoid stacks

Shown here is a chloroplast inside a cell, with the outer membrane (OE) and inner membrane (IE) labeled. Other features of the cell include the nucleus (N), mitochondrion (M), and plasma membrane (PM). At right and below are microscopic images of thylakoid stacks called grana. Note the relationship between the granal and stromal membranes.

© 2004 Nature Publishing Group Soll, J. & Schleiff, E. Protein import into chloroplasts. Nature Reviews Molecular Cell Biology 5, 198-208 (2004) doi:10.1038/nrm1333. All rights reserved. View Terms of Use

Figure Detail

What Are the Steps of Photosynthesis?

Photosynthesis consists of both light-dependent reactions and light-independent reactions. In plants, the so-called "light" reactions occur within the chloroplast thylakoids, where the aforementioned chlorophyll pigments reside. When light energy reaches the pigment molecules, it energizes the electrons within them, and these electrons are shunted to an electron transport chain in the thylakoid membrane. Every step in the electron transport chain then brings each electron to a lower energy state and harnesses its energy by producing ATP and NADPH. Meanwhile, each chlorophyll molecule replaces its lost electron with an electron from water; this process essentially splits water molecules to produce oxygen (Figure 5).

An illustration shows the light and dark reactions for photosynthesis drawn on top of a simplified image of a chloroplast, represented as an oviform capsule. Inside the capsule are five stacks of three or four flat, green thylakoid discs. The discs look like stacked quarters. Two thylakoid stacks have been cut away so that their interiors, which are hollow, are visible.

Figure 5: The light and dark reactions in the chloroplast

Photosynthetic cells contain chlorophyll and other light-sensitive pigments that capture solar energy. In the presence of carbon dioxide, such cells are able to convert this solar energy into energy-rich organic molecules, such as glucose. These cells not only drive the global carbon cycle, but they also produce much of the oxygen present in atmosphere of the Earth. Essentially, nonphotosynthetic cells use the products of photosynthesis to do the opposite of photosynthesis: break down glucose and release carbon dioxide.

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Answer:

Student 2

Explanation:

Divergent boundaries happen when two continental plates move away from each other causing seafloor spreading.

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Answer:

solid

liquid

gas

.......

Answer:

Explanation:

Gas - (Also known as "Foam")

Liquid - (Also known as "Emulsion")

Liquid - (Also known as "Gel")

Solid - (Also known as "Solid Sol")

Answer:

sun light and water and fresh air

Answer:

The standard definition for a habitable planet is one that can sustain life for a significant period of time. As far as researchers know, this requires a planet to have liquid water. To detect this water from space, it must be on the planet's surface.

Explanation:

:)

Answer:

Circulatory System

Explanation:

Capilaries are tubes that transport blood and provide nutrition through diffusion in tissues. Transporting blood is a function of the circulatory system.

Answer:

photosynthesis cells

Explanation:

Ground tissue cells include parenchyma, (photosynthesis in the leaves, and storage in the roots), collenchyma (shoot support in areas of active growth), and schlerenchyma (shoot support in areas where growth has ceased). Parenchyma are the most abundant and versatile cell type in plants

Answer:

The daughter cells need a copy of every chromosome in order to replicate and separate.

Explanation:

Cells have to replicate their genetic material to make a whole other cell. Before mitosis the cells need this step for mitosis.

Answer:

The fundamental importance of chromosomes is that they contain DNA, or deoxyribonucleic acid, the substance that contains every organism's genetic code. When a cell divides, its chromosomes must first replicate. Cells divide in two basic ways – mitosis and meiosis. The latter type of division incorporates the former.

Explanation:

Answer:

The act, state or process of changing, such as in form or structure; the conversion from one form to another.

Explanation:

Answer:

True or false: chemical reactions can occur in the cells of living thing.

=true

Answer:

True

Explanation:

What do you think happens in your stomach?

Answer:

The skeletal system is your body's central framework. It consists of bones and connective tissue, including cartilage, tendons, and ligaments. It's also called the musculoskeletal system.

Explanation:

Answer:

Although metamorphic rocks typically form deep in the planet's crust, they are often exposed on the surface of the Earth. This happens due to geologic uplift and the erosion of the rock and soil above them. At the surface, metamorphic rocks will be exposed to weathering processes and may break down into sediment.

Explanation:

Answer:

Four innovations are central nervous system, eyes, bilateral and hermaphrodites.

Explanation:

Innovations found in an ancient flatworm were the presence of central nervous system means head and a brain. The head had eyes which is the first in the animal world. Their body is bilateral means equally divided into two parts. They are also hermaphrodites means having male and female on a single organism which was not present at that time of animals.

Answer:

In digestion molecules come from food the animal eats (option a).

Explanation:

Foods that are consumed are those that provide the necessary molecules for the maintenance of the organism. The process of digestion consists of converting food into molecules —amino acids, glucose and fatty acids— that are easily absorbed by the body.

When an animal eats food, its digestive system is in charge of processing it and converting it into simple molecules, necessary to cover its requirements.

Answer:

Anaerobic cell respiration (glycolysis + fermentation) produces 2 ATP/glucose consumed. Aerobic cell respiration (glycolysis + the Krebs cycle + respiratory electron transport) produces 36 ATP/glucose consumed.

Explanation:

Anaerobic respiration (without oxygen)

During glycolysis, glucose molecules (six-carbon molecules) are split into two pyruvates (three-carbon molecules) during a sequence of enzyme-controlled reactions. This is the same reaction as occurs in aerobic respiration.

Answer:

Explanation:

Glycolysis breaks down glucose (6-C) into two molecules of pyruvate (3C), and also produces: Hydrogen carriers (NADH) from an oxidised precursor (NAD+) A small yield of ATP (net gain of 2 molecules)

Answer:

Biogenesis is the production of new living organisms. Conceptually, biogenesis sometimes attributed to Louis Pasteur and encompasses the belief that complex living things come only from other living things, by means of reproduction.

:)

Answer:

0.2 million years ago

Explanation:

Correct Answer

I'm writing this because, I would like school to be more fun! First, It would most likely motivate kids to do school, And what I mean by more fun is adding funny pictures, fun fact's, Etc.

How about when Class Connect start's, we could Do this, By example: " The bird on the coordinate jumped on 3, and flew to 7! ". This could make kids use a method to help them do things, More than just coordinate's.

We can decorate K12 by the holiday's! Like, Snowflake's for Christmas, and other's. And maybe a button ( You can only use once) To make it rain around the screen! Like snowflake's, Flower's, Etc.

In conclusion, To make K12 more fun, We could add a little Daily streak that go's up every time you attend Class Connect! This could make Children attend more for their Daily Streak.

This is why K12 should do this.

Sincerely,

Victoria Golubev

(Pts: Kid's would most likely like school more if this will be done!)

Answer:

Plants need carbon in the form of

✔ carbon dioxide.

Breaking down glucose to provide energy in the form of ATP for metabolic processes is called

✔ cellular respiration.

Plants capturing light energy to form simple sugars using water and carbon dioxide is called

✔ photosynthesis.

Carbon-containing energy sources formed from the decomposition of prehistoric organisms are called

✔ fossil fuels.

Explanation:

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