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Jet001 [13]
4 years ago
7

When analyzing the ice core, the scientists discovered that the carbon dioxide (CO2) levels in the atmosphere were much lower th

an they are now. Since CO2 is a greenhouse gas, what does the lower CO2 level in the past say about our current climate?
Biology
1 answer:
lbvjy [14]4 years ago
4 0
That our current climate contains more greenhouse gases. This also shows how manufacturing effects the environment. Hope this is helpful
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garri49 [273]
The respiratory system brings oxygen unto the lungs, while the circulatory system delivers oxygen throughout the body.
3 0
3 years ago
Read 2 more answers
this is regular science but the topic is introduction to body systems from the science book please someone help thanks
Marrrta [24]

Answer:

1. Homeostasis

2. Organ system

3.The bones of the skeletal system serve to protect the body's organs, support the weight of the body, and give the body shape. The muscles of the muscular system attach to these bones, pulling on them to allow for movement of the body.

4.The nervous and endocrine systems are two forms of communication system in the human body that integrate, coordinate and respond to sensory information which is received by the human body from its surroundings

5.The skin functions by protecting the body from basic elements of nature such as water, UV sunlight and wind. ... However, skin in integumentary system acts by maintaining the internal conditions that is required by the body while it is excretory system because it secretes a fluid waste called sweat or perspiration.

6.In order to survive, cells must satisfy some basic needs such as oxygen, water, nutrients, waste removal, and maintaining of homeostasis. Oxygen and nutrients are necessary for different processes inside the cell. For instance, cellular respiration uses glucose and oxygen to form energy in the form of ATP.Water is important for different chemical reactions, as well. Also, the result of different processes, waste is produced and it is important to remove it from the cell. Finally, it is important that cell and whole body conditions do not vary so much and that homeostasis is maintained.

7.Ribosomes provide another good example of structure determining function. These small cellular components are made of protein and ribosomal RNA (rRNA). Their main function is to translate messenger RNA, or mRNA, into strings of amino acids called proteins.

8.  the body is not in homeostasis from 7 to 10 hours. Explanation: The given graph shows homeostasis in terms of body temperature. The normal body temperature, that is 37 degrees C is maintained from 1 to around 6:45 hours.

9.There are several reasons why the body temperature falls continuously just like when you are exposed to an extreme cold weather or wearing wet clothing for a long time. This abnormality state of the body temperature can lead into some potential diseases and disorders like infection, insomnia, stress and sepsis

10.Sweating also hydrates your skin and maintains the balance of electrolytes in your body. The fluid you sweat comprises mainly salt and water. Excessive sweating can cause dehydration since you lose a large amount of water. The technical term for excessive sweating is hyperhidrosis.

Explanation:

7 0
3 years ago
" The molecules used to cut, copy, and connect the DNA segments used in this process are
Vlad [161]
The answer is #2  ²²²²²²²²²²²²²²²²²²²²²²²²
5 0
3 years ago
A - Glycolysis B - Intermediate Step C - Kreb's Cycle D - Electron Transport Chain E - Anaerobic Respiration 1. Produces approxi
Advocard [28]

Answer:

1. D

2. A

3. A

4. C

5. B

6. B

7. D

8. A

9. E

10. C

Explanation:

The process of cellular respiration, which generally involves the synthesis of energy from carbohydrate molecule (glucose), occurs in four major steps in eukaryotic cells. These steps are glycolysis, kreb cycle, bridge or intermediate step and oxidative phosphorylation (electron transport chain).

The features of each step is highlighted below:

GLYCOLYSIS: This is the first stage if cellular respiration in which Glucose is broken down into 2 pyruvic acid (pyruvate). It can occur without oxygen in the system and it uses 2 ATP molecules to start the process.

INTERMEDIATE STAGE: This stage is also called bridge or transition reaction. It does not produce any ATP molecule but only prepares the reaction for aerobic respiration in the mitochondria by turning Pyruvate molecule into acetyl CoA.

KREB'S CYCLE: This is the third step in the process. AcetylcoA undergoes series of chemical processes to release 4 carbon dioxide molecules and generates FADH2 and NADH electron carriers. It takes two cycles to process two glucose molecules that is used in the respiration process.

ELECTRON TRANSPORT CHAIN: In this stage, approximately 34 ATP molecules are produced in the mitochondria using enzyme called ATP synthase, which catalyse the conversion of ADP to ATP.

ANAEROBIC RESPIRATION: This type of respiration occurs in the absence of oxygen. In animal cells, lactic acid/lactate is produced and stored in the muscle as an end product

8 0
3 years ago
Helium has an atomic number of two so for its outer energy level is full. Helium is considered
laila [671]

Answer:

Helium is considered as noble gas or inert gas because it belongs to noble family in the periodic table.

Explanation:

Helium is stable atom because it has complete outermost shell i. e. 2 electrons. Except noble gases, all the elements are reactive because they have incomplete outermost shell so for attaining stability, they form bonds with each other and attain the electronic configuration of noble gases. Helium has given the name of noble gas due to stability.

6 0
3 years ago
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