which type of gas or gasses are ressponsible for the start of life on earth
Answer:
Before life began on the planet, Earth's atmosphere was largely made up of nitrogen and carbon dioxide gases. After photosynthesizing organisms multiplied on Earth's surface and in the oceans, much of the carbon dioxide was replaced with oxygen.
Explanation:
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how to identify oxygen and carbon dioxide?
Answer:
Place a glowing splint in the test tube, and if it reignites, it could be oxygen. Place a burning splint into a test tube, and if it goes out, it could be carbon dioxide. Or, place carbon dioxide gas in limewater, and if it turns milky and gets chunks, it is carbon dioxide.
Answer: Place a glowing splint in the test tube, and if it reignites, it could be oxygen. Place a burning splint into a test tube, and if it goes out, it could be carbon dioxide. Or, place carbon dioxide gas in limewater, and if it turns milky and gets chunks, it is carbon dioxide.
Explanation:
i have done it before:)))
Which of the following is not true about hydrothermal vents?
A. They provide a look into what ancient life may have looked like.
B. They contain chemosynthetic organisms.
C. They cannot contain life of any sort.
D. They are found in volcanic areas under the ocean.
C, because that would contradict observations
Answer:
its (c) cz....
Explanation:
The floor of the deep ocean is almost devoid of life, because little food can be found there. But around hydrothermal vents, life is abundant because food is abundant. ... These vents are the only places on Earth where the ultimate source of energy for life is not sunlight but the inorganic Earth itself. hope it helps u I tried my best.pls mark me as branliestMr. Lim wants to start a sustainable oil palm plantation. In your opinion, how can Mr.Lim control the rat population that frequently destroy crops?
Answer:
hope it helps
Explanation:
He can grow a cat or birds.
He can set up traps.
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Dominic made the table below to organize his notes about mixtures. A 1-column table. The first column labeled properties of mixtures has entries has no set composition, must have more than one state of matter, must have more than one substance. What mistake did Dominic make? The title should read “Properties of Solutions” because some mixtures do not have all of the properties listed. There is a definite recipe to make each mixture, so the composition of a mixture is set. Although it is possible to have more than one state, it is also possible to have only one state. A single substance can be used to make a mixture if the substance is composed of more than one element.
Answer:
Explanation:
what
When Kaori Sato used a simulated forest to study the Commons Dilemma in a communal culture, he found:
Answer:
results much like those obtained in western cultures
Explanation:
The nuclei (the structure inside a cell that contains DNA) of the cheek cells have been stained using a special dye so that they appear purple. What shape are they
Answer: Oval.
Explanation:
The nucleus of a cell is a membranous structure normally found in the center of eukaryotic cells and is where most of the cellular genetic material is found, organized in DNA molecules (deoxyribonucleic acid) associated with proteins such as histones, which make up the chromosomes.
The function of the nucleus is to maintain the integrity of the genes in the DNA and to regulate gene expression to control cellular activities. It then controls when DNA is transcribed into RNA (ribonucleic acid) and when it is exported to the cytoplasm to be translated into proteins.
The nucleus is composed of a nuclear envelope consisting of a double membrane that surrounds it, as well as pores that allow the passage of RNA for the regulation of gene expression.
The cells of the inner cheek are classified as non-keratinized stratified squamous epithelium. An epithelium is a tissue made up of joined cells that line the outer surface of the body and inner organs. Squamous cells are flat, scale-like, whereas stratified cells are arranged in multiple layers. Non-keratinized means that the cells constitute soft tissue found in the moist parts of our body, such as the mouth, stomach, among others. In a normal healthy cell, the nucleus is uniformly stained, oval in shape and smaller in relation to the cytoplasm.
Why do biologists classify
Answer:
Biologists classify organisms because:
Classification allows us to understand diversity better. It helps in the identification of living organisms as well as in understanding the diversity of living organisms. Classification helps us to learn about different kinds of plants and animals, their features, similarities and differences. It enables us to understand how complex organisms develop from simpler organisms. They are grouped under different categories to understand and study the features, similarities and differences between different living organisms. It is essential to understand the inter-relationships among the different groups of organisms. Classification forms a base for the development of other biological sciences.1) what are the roles of plants, animals and decomposers in an ecosystem ??
Explanation:
Decomposers and scavengers break down dead plants and animals. They also break down the waste (poop) of other organisms. Decomposers are very important for any ecosystem. If they weren't in the ecosystem, the plants would not get essential nutrients, and dead matter and waste would pile up.
Which diagram correctly shows how heterozygous alleles are found on homologous chromosomes?
A chromosome is labeled Upper A a.
A chromosome is labeled a a.
2 chromosomes are labeled Upper A and a.
2 chromosomes are labeled a and a.
Answer:
the chromosome are found in the nucleus of a body cell in pair
A small child managed to eat a bit of dirt while playing outside. Which of the following would prevent the child from getting sick from the bacteria ingested?
If there were not a pathogenic bacteria in the dirt
If the child had previously taken antibiotics for that type of bacteria
If the child did not have the vaccination to fight the bacteria
If the child’s cells had complementary receptor molecules that bind to the bacteria
Answer: option 2
Explanation:.....
Answer: If the child had previously taken antibiotics for that type of bacteria.
describe a tulip flower based on its physical characteristics
Answer:
D)The tulip plant is categorized as a monocot. The statement that best describes the flower based on its physical characteristics is "The tulip plant is categorized as a monocot." Monocots are plants the bears' flowers whose seeds regularly contain just a single embryonic leaf or cotyledon.
Explanation:
The liver converts ammonia to this much less toxic nitrogen waste _______.
A. Nitric acid
B. H20
C. Acetic acid
D. Urea
Answer:
D. Urea
Explanation:
[tex]2 NH_3 (ammonia) + CO_2 + 3 ATP + H_2O \ => \ H_2N-CO-NH_2 (urea) + 2 ADP + 4 Pi + AMP.[/tex]
Kaji pernyataan berikut.
Pertumbuhan bakteria adalah lebih baik dalam keadaan gelap daripada keadaan bercahaya.
(a) Nyatakan satu pernyataan masalah daripada maklumat di atas. [1 markah]
(b) Cadangkan satu hipotesis untuk menyiasat pernyataan di atas. [1 markah]
(c) Berdasarkan pernyataan yang diberi, reka bentuk satu eksperimen makmal untuk menguji hipotesis anda menggunakan dua piring petri steril dengan penutup berlabel X dan Y, dawai gelung, larutan kultur bakteria Bacillus sp., agar-agar nutrien steril dan pita selofan.
Huraian anda harus mengandungi aspek berikut:
(i) Tujuan eksperimen [1 markah]
(ii) Mengenal pasti pemboleh ubah [2 markah
(iii) Prosedur dan kaedah [4 markah]
(iv) Penjadualan data [1 markah)
Answer:
i didn't understand yiur language
What statement best explains how the mass of an atom is organized?
Answer:,,,,,,,,,,,
Explanation
__________ commonly cause increased energy and alertness, increased heart rate and respiration, and loss of appetite.
Answer:
Stimulants commonly cause increased energy and alertness, increased heart rate and respiration, and loss of appetite.
Many antibiotics work by preventing the proper synthesis of the peptidoglycan cell wall. These antibiotics are most likely to be effective against what types of bacteria
Answer: Gram-positive bacteria.
Explanation:
Gram-positive bacteria are those bacteria that stain dark blue or violet by Gram staining. This is due to the structure of the cell envelope, since they possess a cell wall composed of a thick layer of peptidoglycan, which surrounds the previous one. The cell wall is attached to the cytoplasmic membrane by lipoteichoic acid molecules. The peptidoglycan layer confers high resistance to these bacteria and is responsible for retaining the stain during Gram staining. Unlike gram-positive bacteria, gram-negative bacteria have a second lipid membrane outside the cell wall and a single peptidoglycan layer.
An antibiotic is a chemical substance produced by a living being or synthetically derived, which kills or prevents the growth of certain classes of sensitive microorganisms, such as bacteria. An antibiotic could be bacteriostatic if it prevents the growth of bacteria or bactericidal if it destroys them.
Antibiotics usually attack cell walls, such as β-lactams that act on the peptide chains of the bacterial cell wall. That is, they act by inhibiting peptidoglycan synthesis. This is why gram-positive bacteria are susceptible to certain types of antibiotics because they possess a large amount of peptidoglycan.
This diagram summarizes a method to group land plants.
A diagram summarizes a method to group land plants. Plants are divided into 1 and 2. 2 is divided into 3 and 4. 4 is divided into 5 and 6.
Which row in the table best represents the evolution of plants that match the diagram?
Labels for Plant Classifications
1
2
3
4
5
6
A
Gymnosperms
Angiosperms
Seed plants
Seedless plants
Monocots
Dicots
B
Dicots
Monocots
Angiosperms
Gymnosperms
Seed plants
Seedless plants
C
Seed plants
Seedless plants
Angiosperms
Gymnosperms
Dicots
Monocots
D
Seedless plants
Seed plants
Gymnosperms
Angiosperms
Monocots
Dicots
Answer:
The correct answer is D.
Explanation:
The plants are grouped formally into 12 phyla (phylum plural) and are collected in four groupings. These four groupings are based on the history of the evolution of important plant characteristics:
Nonvascular plants evolved earliest. They are distinct from the algae because they preserve the embryo inside of the reproductive structure after fertilization. There is no vascular tissue, xylem, and phloem for these plants to convey nutrients, water, and food. For example, moose, liverwort, and hornworts. These plants do not grow very high without vascular tissue.Vascular seedless plants have evolved into non-vascular tissue but no seeds. The fern, fern, club moss, and horsetails are examples. These plants could grow larger with vascular tissue.Gymnosperms have evolved into seeds but have no blooms. For example, redwood, fir, and cypress trees. Gymnosperms. Gymnos in Greek means "naked"; the gymnosperm seeds are bare, not floral.Flowers or angiosperms have developed into vascular tissue, seeds, and flowers. Angiosperm for example includes magnolia, roses, tulips, and tomatoes.Answer:
The correct answer is D.
Explanation:
Each of the following will result in complement activation EXCEPT Group of answer choices TLR binding to PAMP on the microbe. recognition of lipid-carbohydrate molecules on the surface of the microbe. lectin binding to mannose on the surface of the microbe. Antibody binding to antigen. All of these will result in activation of complement.
Answer:
TLR binding to PAMP on the microbe
Explanation:
The complement system is a group of proteins in the blood that enhance immune responses by complementing the ability of antibodies and phagocytic cells to mediate effector responses (e.g., lysis, activation of inflammation, opsonization, solubilization of immune complexes, etc). Complement can be activated through the recognition of microbes by soluble pattern-recognition molecules (i.e., lectin pathway) or antibodies (i.e., classical pathway). The classical pathway requires the formation of antigen-antibody complexes for its activation (it is a specific immune response). On the other hand, Toll-like Receptors (TLRs) are molecular receptors that recognize viral and bacterial products (i.e., pathogen-associated molecular patterns or PAMPs), which is a key defense mechanism from the innate immune system response.
The fibrous protein that gives skin its flexibility and helps skin regain its shape after being expanded is:
Answer:
Elastin
Explanation:
The elastin is defined as an extracellular matrix protein which lends to the elasticity and also resilience to the tissues such as the lungs, skin, arteries, tendons, and the ligaments.
Elastin synthesized from precursor molecule named tropoelastin.
Elastin is the fibrous protein which gives the skin its flexibility and also helps the skin regain its shape.
There are 2 types of endoplasmic reticulums.
Plz explain, i will give brainliest
What are the 2 types?
How are they different from one another?
Explain how their structures are different.
Explain how their functions (jobs) or what they make are different.
Which animal population do scientists frequently study in order to identify specific ways to evaluate the impacts of contaminants on biological communities?
a. bottlenose dolphins
b. giant tortoises
c. mallard ducks
d. swan geese
Answer:
mallard ducks I think so
Answer:
D.
Explanation:
Galapagos tortoises have been and continue to be threatened by predation and habitat destruction from invasive species, and increasing human
During cellular respiration, the first CO2 is generated during _____ and the remaining carbons are given off as CO2 during _____.
Answer:
Glycolysis and Krebs cycle.
Explanation:
During cellular respiration, the first carbondioxide gas is generated during glycolysis while the remaining carbons are given off as carbondioxide during Krebs cycle. During the process of glycolysis in cellular respiration, glucose is oxidized forming carbondioxide and water whereas during the Krebs cycle, the two carbon atoms of acetyl-CoA are released and each turns into a carbondioxide molecule.
What term describes the organisms that obtain energy from dead organic matter and aid nutrient cycling
Answer:
Decomposers.
Explanation:
Decomposers are the organisms that obtain energy from dead organic matter and help in nutrient cycling. The example of such type of organisms are bacteria and fungi. These organisms feed on the dead bodies of plant and animals. It perform two function i.e. clean the environment by removing the dead body through feeding on it and add nutrients in the soil which helps the plants to grow more efficiently.
how are proteins and nucleic acids related
Answer: Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis
Explanation:
biology b unit 10 workbook
Answer:
i also needed help w this
Explanation:
The original pair of individuals involved in a cross is called
the _____?
Answer:
p generation
Explanation:
Which of the following is NOT a unifying theme in biology?
A. All levels of life have systems or related parts.
B. Structure and function are not related in biology.
C. Organisms must maintain homeostasis to survive diverse environments.
D. Evolution explains the unity and diversity of life.
Genes for the oxygen-carrying proteins hemoglobin and myoglobin descend from a common ancestor but act in very distinct ways today. They are _____. Group of answer choices paralogous shared ancestral characters paraphyletic horizontally transferred
Answer: paralogous
Explanation:
Paralogous genes are a class of homologous genes which are due to the duplication of gene, then this are refered to as paralogous.
Genes for the oxygen-carrying proteins hemoglobin and myoglobin descend from a common ancestor but act in very distinct ways today. They are referred to as paralogous.
What was spidermans mutagen ?
Answer:The mutation disease was the result of Spider-Man mutating even further from the spider bite. The first symptoms of the disease caused Spider-Man to lose his spider powers. To figure out what was going on, Spider-Man went to see Dr. Curt Connors.
Explanation:
Answer:The mutation disease was the result of Spider-Man mutating even further from the spider bite. The first symptoms of the disease caused Spider-Man to lose his spider powers. To figure out what was going on, Spider-Man went to see Dr. Curt Connors.
