How did stromatolites contribute oxygen to the early atmosphere?
by weathering of rocks
through photolysis
through methane degradation
through photosynthesis
Answer:
by weathering of rocks
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Stromatolites contributed oxygen to the early atmosphere through photosynthesis.
What are stromatolites ?Stromatolites are layered sedimentary formations that are created mainly by photosynthetic microorganisms such as cyanobacteria, sulfate-reducing bacteria, etc. that lives today in a wide range of environments ranging from the shallow shelf to lakes, rivers, and even soils.
Cyanobacteria were ultimately responsible for one of the most important global changes that the Earth has undergone. Being photosynthetic, cyanobacteria produce oxygen as a by-product.
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please help for my biology
Hormones are proteins that regulates many functions in the body, such as growth and cell differentiation. Which of the following does NOT describe a function of proteins in living organisms?
Answer:
c.
Explanation:
They serve as a short-term energy source for the body.
Two short-haired guinea pigs are mated several times. Out of 100 offspring, 25 of them have long hair. What are the probable genotypes of the parents? Show the Punnett Square to prove it.
Answer:
Ss (male) × Ss (female)
Explanation:
This question involves a single gene coding for hair length in guinea pigs. Based on the information in this question, the allele for short hair (S) is dominant over the allele for long hair (s). This means that a guinea pig will only be phenotypically long-haired if the genotype is "ss".
According to this question, Two short-haired guinea pigs are mated several times. Out of the 100 offsprings produced by this cross, 25 of them have long hair (recessive). This means that the phenotypic ratio of this cross is 3 short hair : 1 long hair i.e. 100 - 25 = 75 short hair. 75/25 = 3/1 = 3:1
To produce this phenotypic ratio, the parents must both be heterozygous (Ss) for the hair length gene.
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What is the third step in fieldwork for marine science?
a.) sorting/analysis
b.) analysis/presentation
c.) presentation/exposure
Answer:
analysis/presentation
Explanation:
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The third step in fieldwork for marine science is analysis/presentation, Thus option "B" is correct.
Why is it important to study marine science?Marine science recreates key role in the ongoing search to understand our world and to control its resources.
The interdisciplinary nature of the Marine Science curriculum will organise students to analyze deeply such co occuring issues as environmental alter, human clashes on the ocean, and biodiversity.
Thus option "B" is correct.
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write the functions of the diencephalon
Answer:
The diencephalon relays sensory information between brain regions and controls many autonomic functions of the peripheral nervous system. This section of the forebrain also connects structures of the endocrine system with the nervous system and works with the limbic system to generate and manage emotions and memories.
Explanation:
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Describe the order of succession for the regrowth of
the fire destroyed forest.
Explanation:
Primary succession is one of two types of biological and ecological succession of plant life, occurring in an environment in which new substrate devoid of vegetation and other organisms usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited.[1] In other words, it is the gradual growth of an ecosystem over a longer period of time.[2][3]
Primary succession occurring over time. The soil depths increase with respect to the increase in decomposition of organic matter. and there is a gradual increase of species diversity in the ecosystem. The labels I-VII represent the different stages of primary succession. I-bare rocks, II-pioneers (mosses, lichen, algae, fungi), III-annual herbaceous plants, IV-perennial herbaceous plants and grasses, V-shrubs, VI-shade intolerant trees, VII-shade tolerant trees.
Primary succession on Rangitoto Island
In contrast, secondary succession occurs on substrate that previously supported vegetation before an ecological disturbance from smaller things like floods, hurricanes, tornadoes, and fires which destroyed the plant life.[4]
11. Roses now come in several colors such as orange and purple. Which process are florist most likely to use in creating these new flowers?
a. Genetic cloning
b. Protein synthesis
c. Artificial selection
d. Asexual reproduction
Answer:
C
Explanation:
It's essentially just selective breeding and like the equivalent to people breeding dogs for certain traits
Answer:
C
Explanation:
edge 2021
_who was cleopatra??_
Answer:
Cleopatra VII Philopator was the last active ruler of the Ptolemaic Kingdom of Egypt. As a member of the Ptolemaic dynasty, she was a descendant of its founder Ptolemy I Soter, a Macedonian Greek general and companion of Alexander the Great.
Answer:
cleopatra was the last active ruler of the Ptolemaic Kingdom of Egypt
Can someone please help me
Answer:
It does not tell you the exact age of something.
What are the 3 parts of the Cell Theory?
Answer:
1. that DNA is passed between cells during cell division
2. that the cells of all organisms within a similar species are mostly the same, both structurally and chemically
3. that energy flow occurs within
Explanation:
These findings led to the formation of the modern cell theory, which has three main additions: first, that DNA is passed between cells during cell division; second, that the cells of all organisms within a similar species are mostly the same, both structurally and chemically; and finally, that energy flow occurs within
how is the location of the rough ER related to.its overall purpose for the cell
Without the Sun, there would be no life on Earth. This is because the Sun is the major source of all
on Earth.
A)
energy
B)
flares
C
heat
D)
sunfish
Answer:
A
Explanation:
Match the population ecology term to its definition.
Answer:
Population =B)
Community = A)
Ecosystem= C)
Species= D)
Explanation:
I hope this helps you ;)
12. Many people worldwide are malnourished, in part because food
production is
a, sufficient, but distribution is inconsistent,
b, dependent on heavy fertilizer use,
e, slanted toward grain crops,
d, dependent on using genetically engineered plants,
Answer:
A.
Explanation:
Makes the most logical sense.
Answer:
THE ANSWER IS B
Explanation:
Decommissioned oil rigs are sometimes converted to artificial reefs in the Gulf of Mexico. What is the likely impact to the ecosystem by creating artificial reefs around these retired oil rigs?
a
The large fish population will increase, but the small fish population will decrease.
b
Biodiversity is increased throughout the ecosystem.
c
Biodiversity remains the same because organisms do not like man-made structures
d
Invasive species of fish move into the ecosystem because there are no natural predators.
Answer:
B
Explanation:
B
The likely impact on the ecosystem by creating artificial reefs is that biodiversity would be increased throughout the ecosystem (Option B).
What is biodiversity?The term biodiversity makes reference to all types of forms of life (organisms) present in a given ecosystem.
Biodiversity can also be used to explain the genetic and phenotypic variation in a population.The loss of biodiversity may have drastic consequences on the whole ecosystem.In conclusion, the likely impact on the ecosystem by creating artificial reefs is that biodiversity would be increased throughout the ecosystem (Option B).
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The relative difference in charge across a plasma membrane is the ____________ in an inactive excitable cell. A ____________ is used to measure the voltage difference across the plasma membrane. This is done by placing one microelectrode into the ____________ and the other microelectrode outside the neuron into the ____________ . The RMP has a value that is typically ____________ millivolts. More positive ions reside ____________ a neuron than ____________ a neuron when it is at rest.
Answer:
Resting membrane potential; voltmeter; neuron; interstitial fluid; -70; outside; inside.
Explanation:
A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles with their respective functions in all living organisms such as trees, birds, and bacteria include; nucleus, cytoplasm, cell membrane, golgi apparatus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, vesicles, etc.
The relative difference in charge across a plasma membrane is the resting membrane potential in an inactive excitable cell. A voltmeter is used to measure the voltage difference across the plasma membrane. This is done by placing one microelectrode into the neuron and the other microelectrode outside the neuron into the interstitial fluid. The RMP has a value that is typically -70 millivolts. More positive ions reside outside a neuron than inside a neuron when it is at rest.
When does cytokinesis occur in plant cells
Answer:
Prophase
Explanation:
Cytokinesis begins in anaphase in animal cells and prophase in plant cells, and terminates in telophase in both, to form the two daughter cells produced by mitosis.
Whales, which live in the water, have hips. These structures are important for carrying the weight of animals that walk on land. Finding this body part in animals that dont walk on land would lead us to predict what finding in the fossil record?
A Hips in ancient animals that always lived in water
B. Land-dwelling animals that dont have hips
C. A form of whale that lacked this structure
D. An ancestor of whales that walked on land
Answer:
d
Explanation:
Can someone help me
Answer:
B
Explanation:
What are some Cons about cloning?
Answer:
Explanation:
The process is not entirely safe and accurate. Despite being genetically identical with each other, clones will not be the same regarding behavioral attributes. ... It is regarded as unethical, and the probability of abuse is very high. ... The offspring lack genetic uniqueness. ... It is not yet fully-developed.Answer:
1) The process is dangerous.
2) The process is not fully developed yet.
3) Cloning does not always work.
4) Faster aging.
Explanation:
Hope this helps
What is Environment Secretary?
Explanation:
refers to carbinet secretary for food, rural affairs and environment
Answer:
The Secretary of State for Environment, Food and Rural Affairs. This is important in a society.
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Lichens can do photosynthesis in harsh habitats where plants cannot grow, such as on the surface of rocks, where there is no soil and little water. This is possible because
A) lichens have fungal hyphae that are efficient at absorbing water and minerals to support mutualistic cyanobacteria.
B) lichens are ingestive heterotrophs that can obtain ATP from the chemicals in rocks.
C) lichens have extensive, fibrous roots.
D) lichens are exceptionally efficient at capturing light from the sun.
E) lichens are microscopic and require very little in the way of raw materials.
Answer: A. lichens have fungal hyphae that are efficient at absorbing water and minerals to support mutualistic cyanobacteria.
Explanation:
Photosynthesis, is referred to as the process whereby there's transformation of light energy to chemical energy by green plants and some other other organisms.
We should note that for lichens, they can do photosynthesis in harsh habitats such as on the surface of rocks, where there is no soil and little water because they have fungal hyphae that are efficient at absorbing water and minerals to support mutualistic cyanobacteria.
Therefore, the correct option is A.
13)
What is at the base of all ecological pyramids?
A)
consumers
B)
decomposers
9
producers
D)
scavengers
what is life cycle in simple definition
Answer:
is the corse of event that bring new product into exstence and follow its growth into mature product and evential critical mass or decline
Farmers raise crops that have been made virus-resistant by adding a gene from the teosinte weed. This is an example of... *
natural selection.
gene therapy.
genetically modified organisms.
artificial selection.
Answer:
C. genetically modified organisms.
Explanation:
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what are the two sides of dna made of?
a) sugar and phosphate
b) sugar and hydrogen bonds
c) sugar and bases
Answer:
its made up of alternating sugar and phosphate molecules. or the first option
Explanation:
The sugar is deoxyribose. The rungs of the ladder are pairs of 4 types of nitrogen bases.
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What health and environment factors negatively impact the flow of blood through the body?
Answer:
cow
Explanation:
feet
4. What two energy sources is produced by
Renewable and Non-renewable Sources?
Hurry quickly please!!!
Answer:
Renewable resources: timber and wind
Explanation:
nonrenewable resources: coal and natural gas
what does the following types of algae is uni cell
ular
Answer:
Most often there is a unicellular alga chlamydomonas. It moves in water with the help of two flagella located on the front, narrower end of the cell. Outside the chlamydomonas is covered with a transparent membrane, under which there is a cytoplasm with a nucleus, a red "eye" (a photosensitive body of red color), a large vacuole filled with cell juice, and two small pulsating vacuoles. Chlorophyll, contained in the chromatophores, gives a green the cell a green color.
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Explanation:
Which scientist calculated amounts of nitrogenous bases in DNA?
a. Watson
b. Crick
C.Franklin
d. Chargaff
Answer:
d. Chargaff
Explanation: