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Fran was observing a leaf and a rock with a microscope. Which part of the cell theory might she be investigating?

A organisms are made up of cells
B cells come from pre-exisitng cells
C groups of cells join together to form tissues
D molecules are atoms bonded together

Answer:

movement of rocks in layers of inner earth

Explanation:

bcz the movement of rocks in layers of earth cause earthquake

Answer:

Lol not the ending lol

Explanation:

Deforestation is an complex problem. A recent study by the Food and Agriculture Organization (FAO) reported that during the decade from 1980 to 1990, the world's tropical forests were reduced by an average of 15.4 million hectares per year (0.8 percent annual rate of deforestation). The area of land cleared during the decade is equivalent to nearly three times the size of France. The phenomenon of deforestation is occurring globally, in different types of forests, and for different reasons.

At the end of 1990, Africa had an estimated 528 million hectares, or 30 percent of the world's tropical forests. In several Sub-Saharan African countries, the rate of deforestation exceeded the global annual average of 0.8 percent. While deforestation in other parts of the world is mainly caused by commercial logging or cattle ranching the leading causes in Africa are associated with human activity.

Developing countries rely heavily on wood fuel, the major energy source for cooking and heating. In Africa, the statistics are striking: an estimated 90 percent of the entire continent's population uses fuelwood for cooking, and in Sub-Saharan Africa, firewood and brush supply approximately 52 percent of all energy sources.

Land clearing by farmers may contribute as much as fuelwood gathering in the depletion of tree stocks. According to Porter and Brown, conversion of forests for subsistence and commercial agriculture may account for as much as 60 percent of world-wide deforestation.1 An estimated 20 to 25 percent of annual deforestation is thought to be due to commercial logging. The remaining 15 to 20 percent is attributed to other activities such as cattle ranching, cash crop plantations, and the construction of dams, roads, and mines. In Africa, governments invest substantially more in cash crops than in food crops as reflected in pricing and marketing policies. However, deforestation is primarily caused by the activities of the general population.

Proposed Solutions

While there is general agreement that deforestation is a problem, there is no consensus on its cause or on ways to develop a solution. Some of the proposed solutions include regulating the logging industry, developing forest protection schemes, and addressing human activities that promote deforestation.

Regulating the Logging Industry

Concerned mainly with commercial logging, this approach proposes the regulation of the worldwide industry in logging and other commercial uses of forests. For example, a global treaty on forestry could ban the cutting down of certain types of "endangered" trees (similar to the ban on ivory trade), or greatly decrease the harvesting of some trees (as was done with whaling), or agree to reduce deforestation by a certain percent each year. Regulating commercial logging can lead to sustainable management of forests. As such, countries can require a certain amount of tree replanting or creating tree plantations. Since much of logging is for the pulp and paper industry, that sector can be required to engage in more recycling of used paper products, rather than destroying more forests.

Commercial logging only accounts for at most one-quarter of the global deforestation problem, so focusing only on the logging industry is an inadequate solution. If a treaty on forestry is signed, it may have the unfortunate consequence of appearing to have resolved the problem without dealing with its underlying causes. This approach must be used in combination with others to treat this issue.

Forest Protection Schemes

This approach usually involves the creation of national parks or forest reserves. In developing countries, this may evolve out of pressure by the citizens and local environmental organizations, but the impetus usually comes from abroad. For example, donor countries and international NGOs may use "debt-for-nature" swaps to influence developing nations to set aside forest areas. The donor agencies effectively "buy" the forest area by paying off some of the target country's foreign debt in exchange for the promise not to develop the area. Such a deal has been successfully brokered between Norway and Costa Rica.

While trade regulations and protection of forests are frequently cited as solutions to the problem of deforestation, they are not enough. A recent review of various approaches towards regulating commercial logging concluded that by 1990 "there was general agreement that none of the approaches previously tried had been effective in slowing the rate of deforestation in tropical forests."2 Particularly for sub-Saharan Africa, these proposals do not address the underlying causes because fuelwood is the main source of energy in Africa, and most land clearing is for subsistence agriculture.

There is more I want to say but I could not fit it in.

Answer:

Explanation:

why do you need the answer

Answer:

It shows how much traits are aquirer from child to kid.

Answer:

its the real one no mistake

Explanation:

Answer:

Conduction

Explanation:

Because "Conduction" means feeling warmth or heat

Answer:

it loud and noisy

Explanation:

Answer: They are both similar because when a car makes a noise it can be a beep of the horn or the engine. And music can also make loud noises to but they are alike because a car is able to make noises that can be use for music. and a horn can sound like a trumpet.

Explanation: I hope this helped sorry if it did not. have an amazing day and stay safe

Answer:

Lung disease is any problem in the lungs that prevents the lungs from working properly. There are three main types of lung disease:

Airway diseases -- These diseases affect the tubes (airways) that carry oxygen and other gases into and out of the lungs. They usually cause a narrowing or blockage of the airways. Airway diseases include asthma, COPD and bronchiectasis. People with airway diseases often say they feel as if they're "trying to breathe out through a straw."

Lung tissue diseases -- These diseases affect the structure of the lung tissue. Scarring or inflammation of the tissue makes the lungs unable to expand fully (restrictive lung disease). This makes it hard for the lungs to take in oxygen and release carbon dioxide. People with this type of lung disorder often say they feel as if they are "wearing a too-tight sweater or vest." As a result, they can't breathe deeply. Pulmonary fibrosis and sarcoidosis are examples of lung tissue disease.

Lung circulation diseases -- These diseases affect the blood vessels in the lungs. They are caused by clotting, scarring, or inflammation of the blood vessels. They affect the ability of the lungs to take up oxygen and release carbon dioxide. These diseases may also affect heart function. An example of a lung circulation disease is pulmonary hypertension. People with these conditions often feel very short of breath when they exert themselves.

Explanation:

Put it your own words cause this is kinda advance for 7th

Petroleum now let's see...Petroleum also used for cars and other vehicles is distributed around the world for different uses. Today, fossils fuels are necessary for human survival and everyday life and are the primary source for the world’s energy. They are used for heating, transportation, generating electricity, and creating common products like computers, cosmetics, paint, and household appliances.

Answer:

cell, tissue, organ, organ system, organism

Explanation:

Alright! This will be a snap! All living and non-living things are made of one or more unique substances called elements, the smallest unit of which is the atom, (for example, the element oxygen (O) is made of O atoms, carbon (C) is made of C atoms and hydrogen (H) is made of H atoms. Atoms combine to form molecules. Molecules can be small (for example, O2, oxygen gas, which has 2 atoms of the element O; CO2, carbon dioxide, which has 1 atom of C and 2 of O), medium (for example, C6H12O6, glucose, which has 6 atoms of C, 12 of H, and 6 of O); or large (for example molecules called proteins are made of hundreds of atoms of C, H, and O with other elements such as nitrogen (N). Molecules are the building blocks to all structures in the human body.

All living structures are made of cells, which are made of many different molecules. Cells are the smallest independent living thing in the human body. The body is made of many different cell types, each with a particular function, (for example muscle cells contract to move something, and red blood cells carry oxygen). All human cells are made of a cell membrane (thin outer layer) that encloses a jelly-like cellular fluid containing tiny organ-like

structures called organelles. There are many types of organelles, each with a particular function (for example, organelles called mitochondrion provides energy to a cell). Different types of cells contain different amounts and types of organelles, depending on their function, (for example muscle cells use a lot of energy and therefore have many mitochondria while skin cells do not and have few mitochondria).

As in other multicellular organisms, cells in the human body are organized into tissues. A tissue is a group of similar cells that work together to perform a specific function. There are four main tissue types in humans (muscular, epithelial, nervous and connective). An organ is an identifiable structure of the body composed of two or more tissues types (for example, the stomach contains muscular tissue made of muscle cells, which allows it to change its shape, epithelial tissue which lines both the inner and outer surface of the

stomach, nervous tissue which sends and receives signals to and from the stomach and the central nervous system, and connective tissue which binds everything together). Organs often perform a specific physiological function (for example, the stomach helps digest food). An organ system is a group of organs that work together to perform a specific function (for example, the stomach, small and large intestines are all organs of the digestive system, that work together to digest foodstuff, move nutrients into the blood and get rid of waste). The most complex level of organization, the human organism is composed of many organ systems that work together to perform the functions of an

independent individual.

SUPER HAPPY TO HELP!!!!! :) (P.s. can you please give me brainliest?)

Answer:

cellular respiration

Explanation:

100% sure photosynthesis is for plants

Answer:

The answer to this is A

Explanation:

A biotic factor is an organism that is living, and rainfall and rocks would be abiotic factors, therefore A is the correct answer.

Hope this helps :D

A living thing that alters its surroundings is referred to as a biotic factor. Examples of kinds of birds, and habitats include algae, fish, amphibians, and aquatic plants, hence option A is correct.

The ecosystem's biotic components are alive or extinct creatures. These can reproduce and they are taken from the ecosystem. Animals, birds, plants, fungi, and other similar species are examples of biotic factors.

Biomes, scientists may identify a biome by defining the temperature range, soil type, and amounts of light and water that are peculiar to that location and create niches for various species.

Therefore, the kind of birds is a biotic factor in a biome, and the amount of rainfall and types of rocks are not biotic factors, hence option A is correct.

Learn more about biotic factors, here:

https://brainly.com/question/3778664

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Answer:

Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms.

Explanation:

Answer:

A apple is not an organ but it is a product from a apple tree. The apple tree produces the apple from its reproduction system, which shows that a apple could not be an organ.

Answer:

i would say B

Explanation:

Answer:

Anything that eats the sea duck would also catch the disease and then it would pass on a create a pandemic and can you put me as brainiest.

Explanation:

Answer:

animals and all life use glucose to supply oxygen they need to live

Explanation:

1. wrinkled i believe

2. Rr Rr [the parents are the ones on the outer top and side]

3. RR Rr Rr rr  (round round, round wrinkled, round wrinkled, wrinkled wrinkled)

RR   Rr

Rr    rr

^^where to put them in the box

4. 25% chance of them being wrinkled

5. 75% chance of them being round

Explanation:

I did a similar assignment

hope its right, chief

Answer:

the answer is A and C

Explanation:

Answer:

The answer to your problem would be to choose the first answer, & the last answer.

Explanation:

the atmosphere blocks out most of the sunlight, & blocks off almost all of the U.V. radiation.

Your welcome.

Best of luck to ya in your school,

James Lester.

Answer:

Adaptation, in biology, the process by which a species becomes fitted to its environment; it is the result of natural selection's acting upon heritable variation over several generations.

Explanation:

Answer:

The deposition rate of the two rock layers was identical.

Explanation:

hope it helps :)

Answer:

A shark's skeleton is made of cartilage , a type of strong but flexible tissue .Most other fish are covered in smooth , flat scales . A shark is covered in sharp , toothlike scales called denticles . Most other fish have flaps over their gills.

Explanation:

I hope it's help yu and plz mark me brainliest........... plz plz plz

Explanation:

their size , sharks have big teeth but fishs not

It causes erosion because the water particles are moving over a substance, which pulls away microscopic (and sometimes large) particles of that same substance. When a wave crashes into land or any substance, the particles on the outside of that same substance become loose, and in turn the wave takes the particles away from it and goes wherever the water goes.

Hope this helps and have a nice day.

-R3TR0 Z3R0

Answer:

Mans name was GeorgeNotFound

Explanation:

Answer:

Male is homo-zygous recessive and female is hetero-zygous

Answer: cell —> tissue —> organ —> organ system

aka. D