Answer:
Because the algea was not strong enough yet to live on its own and had to stay close a water source, where it could get water and sunlight without doing any work.
Explanation:
Scientists believe that land plants evolved from green algae due to shared physical traits, biochemical pathways, and their common monophyletic heritage. These include similar mechanisms of cell division, storage of starch, the presence of chlorophyll as a photosynthetic pigment, and being part of the same photosynthetic lineage, the Archaeplastida.
Explanation:The evidence that leads scientists to believe that land plants evolved from green algae is rooted in various shared characteristics and evolutionary lineage. Green algae, especially the Charophytes, share several traits with land plants, such as having chlorophyll a and b as photosynthetic pigments, cellulose cell walls and starch as a storage molecule. Another crucial point to note is a common mechanism of cell division and significant biochemical pathways.
Furthermore, evolutionary thought indicates that all plants, including green algae and land plants, are monophyletic, meaning they descend from a common ancestor. The transition from water to land posed significant challenges to plants in the form of avoiding drying out, spreading reproductive cells in air, developing structural support, and capturing sunlight. Characteristics like these were developed during evolution by both green algae and land plants.
Lastly, the Archaeplastida, which includes green algae and land plants, became photosynthetic through an endosymbiotic relationship with a green, photosynthetic bacterium around 1.65 billion years ago. This lineage evolved into what we know today as red and green algae, and eventually land plants such as mosses, ferns, gymnosperms, and angiosperms. These shared traits and the evolutionary history demonstrate the strongly supported theory that land plants evolved from green algae.
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According to the principle of segregation, what kind of gametes can an individual with the genotype Bb produce?
A. b only
B. B and b gametes
C. B only
D. B, b, and Bd gametes
Answer:
B
Explanation:
50% B allele, 50% b allele
Answer:
Option B, B and b gametes
Explanation:
As per the principle of segregation, a chromatin containing alleles in pair (which expresses certain trait) gets separated during the cell division and lead to formation of new offspring with a varied genotype. This principle of seggregation is very important in producing diverse species from one generation to other.
Hence, option B is correct.
who is the secondary consumer in this food chain?grasses rabbits snakes hawks
Answer:
The answer could be snakes or hawks but snakes is your best bet.
Explanation:
Rabbits eat the grass(the producer) making them the first consumer but the hawks and the snakes can both eat the rabbits making then secondary consumers.
Answer:snakes
Explanation:
first grass is producer then rabbits first consumer ,
snakes then hawks
Which statements describe the characteristics of an individual protein? Check all that apply.
Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting.
what is genetic equilibrium? what conditions are required to maintain genetic equiibrium?
The genetic equilibrium represents the condition of a genotype or an allele in the genetic pool of a particular population, where there are no changes in the frequency in the successive generations. This basically means that the population has managed to reach the peak of its evolution for the environment in which it leaves, so there's no evolutionary pressure for changes.
In order for the genetic equilibrium to be maintained for prolonged period of time, the population should not face any evolutionary pressure that will cause changes in it. In essence, this means that the environment in which the population lives should remain exactly the same as it is for longer period of time, so the population will have no need to change its appearance or behavior.
What was Pangaea?when did it form and when did it break apart it was
Pangaea was a supercontinent. This enormous continent was consisted of all continental masses on Earth that merged together in the late Paleozoic era, around 335 million years ago. Pangaea lasted until the early Mesozoic era, breaking apart roughly around 175 million years ago. From the breaking apart of this supercontinent there were two large masses that formed, Laurasia on the north, and Gondwanaland on the south. As these two remnants of Pangaea continued to break apart, the modern day continents started to form and slowly started to give the planet the appearance that we see in the present.
This is a haploid cell with half the reproductive information from the parent.
Answer:
gamete
Explanation:
is the cell that is the half of the normal cell and is the starting cell of the embrion
A cell with 20 chromosomes divides by mitosis. Each new daughter cell will have _____.
Answer:
I think that there would be about 46 chromosomes.
Explanation:
Answer:
40 chromosomes
Explanation:
What type of cell is prepared to live on its own?
A. Viral cell
B. Unicellular cell
C. Eukaryotic cell
D. Multicellular cell
Answer: A unicellular
Explanation: The entire body is unicellular therefore it can live on it's own
Final answer:
The type of cell that is prepared to live on its own is a unicellular cell (Option B).
Explanation:
Unicellular organisms are made up of a single cell that carries out all the functions necessary for life. In contrast, a eukaryotic cell (Option C) may be part of a multicellular organism and relies on a community of cells to survive. Viruses (Option A) are not considered living because they require a host cell to replicate. Multicellular cells (Option D) are individual cells that are part of a larger organism consisting of many cells, and they cannot live independently.
The presence of a membrane-enclosed nucleus is a characteristic of eukaryotic cells (Option B). Eukaryotic cells have membrane-bound organelles, including a nucleus, which differentiates them from prokaryotic cells which do not have a membrane-bound nucleus.
Lastly, a note on viruses: they are not considered living organisms as they are acellular, meaning they are not made up of cells. They are obligate parasites that require a host to replicate. Therefore, they cannot be categorized with cellular life such as unicellular or multicellular organisms.
Maria has been making weather observations for the last couple of days. She made the following notes on the cloud coverage: "Monday: Sky is clear, no clouds. Tuesday: Sky is partly cloudy, large fluffy clouds".
Which understanding about the water cycle can help Maria explain the difference in the cloud coverage?
A. More water evaporated the land to form the clouds in Tuesday.
B. More water evaporated from the land to clear away the clouds on Monday
C. More water vapor condensed im the atmosphere on Tuesday to from the clouds.
D. More water vapor condensed in the atmosphere on Monday to clear away the clouds.
The correct answer to the problem is C. As I explained on your previous post, condensation is the leading cause of cloud formation.
The presence of large fluffy clouds on Tuesday compared to a clear sky on Monday is best explained by increased condensation of water vapor in the atmosphere on Tuesday, forming clouds.
The difference in cloud coverage that Maria observed on Monday and Tuesday can be explained by the water cycle. When Maria observed a clear sky with no clouds on Monday, it's likely there was less water vapor present in the atmosphere or that the conditions were not suitable for the water vapor to condense into clouds. On Tuesday, when she noted that the sky was partly cloudy with large fluffy clouds, this indicates there was likely more water vapor in the atmosphere that condensed to form the clouds. The most accurate explanation for the difference in cloud coverage is C. More water vapor condensed in the atmosphere on Tuesday to form the clouds.
When a new plant develops from a stem or root of its parent plant this is called what?
Answer:
Leaf cuttings, in which a leaf is placed on moist soil. These have to develop both new stems and new roots.
Explanation:
Some leaves will produce one plant at the base of the leaf. In some species, multiple new plants can be produced at many places on one leaf, and these can be induced by cutting the leaf veins.
Answer:
it is called asexual reproduction
Explanation:
How are the reactants represented in the chemical equation for photosynthesis?
Answer: The equation for photosynthesis states that the combination of carbon dioxide, water and light energy produces a carbohydrate (glucose) and oxygen. The chemical formula is 6CO2 + 6H2O + light energy = C6H12O6 + 6O2. ... This translates to the production of glucose and oxygen from carbon dioxide and water.
I hope this helps you
please mark my answer as brainliest
The two reactants in the chemical equation for photosynthesis are carbon dioxide and water.
What is photosynthesis?Photosynthesis is the conversion of light energy into chemical energy by green plants and other organisms. Light energy is collected and utilized by green plants during photosynthesis to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic molecules.
6CO₂ + 12H₂O --> C₆H₁₂O₆ + 6O₂ + 6H₂O is the general formula for photosynthesis.
The photosynthesis equation indicates that when carbon dioxide, water, and light energy are combined, a carbohydrate (glucose) and oxygen are produced. This leads to glucose and oxygen is produced from carbon dioxide and water.
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Dinoflagellates can perform photosynthesis and provide energy for themselves and for the coral that they live near. The coral provide protection to the dinoflagellates. This is an example of a
A. mutualistic relationship.
B. dependent relationship.
C. parasitic relationship.
D. commensalistic relationship.
Answer: A. mutualistic relationship.
Explanation:
Dinoflagellates are the algae which belongs to the family of Symbiodiniaceae. It is a single celled algae. It develops a mutualistic relationship with the coral polyps. The function of the dinoflagellates is the conduction of the process of photosynthesis. The products of photosynthesis are shared with the coral polyps which gives energy to the coral polyps to form calcium carbonate skeletons. The waste produced after this process in the form of inorganic nutrients and carbon dioxide is again utilized by the dinoflagellates. This way both species obtains the benefit. Hence, it is a mutualistic relationship between the two species.
The coral provide protection to the dinoflagellates. This is an example of a mutualistic relationship. The correct option is A.
The interaction between the dinoflagellates and the coral in this situation is an illustration of a mutualistic relationship.
Mutualism is a form of symbiotic partnership in which the interaction benefits both species.
In this instance, the dinoflagellates carry out photosynthesis and generate molecules that are high in energy, which serves as a source of nutrients and energy for both the dinoflagellates and the coral.
In exchange, the coral offers a safe habitat for dinoflagellates to flourish. It is a mutualistic connection since the life of both organisms depends on it and because both parties gain from it.
Thus, the correct option is A.
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how is modern earth different from earth over four billion years ago
Answer:
Earth was not habitable four billion years ago but now it is the only known planet that supports life.
Explanation:
Four billion years old earth was made up of dust and gases. It is claimed by scientists that the sources from which earth was formed included – a) Lunar rocks, b) Meteorites and c) Zircon crystal. The temperature of earth at that time was extremely high such that all the metals with in it were in molten state. Also there was no oxygen in the atmosphere. All these conditions made earth a non habitable planet.
But the present earth is a habitable planet with life on it that is dependent on its resources like air and water. Also the temperature of earth is much supportive to the existence of life on it.
Which describes the temperature for successfully sperm production
Answer:
Slightly lower than body temperature. Hope this helps.
Explanation:
A scientific theory can be defined as a well-supported and widely accepted explanation of nature. According to this definition, which statement describes a scientific theory.
Answer:
The universe was created at the Big Bang.
Explanation:
A scientist hypothesizes that the lack of chinook salmon is negatively affecting the orca population. Would this hypothesis need to be tested by another scientist in order to become a theory? Why or why not?
A) It is not done because scientist do not make mistakes.
B) It is not done because scientists do not read each other’s work.
C) It is done because peer review and the consideration of an alternative explanation should be considered.
D) It is done because peer review is not mandatory when developing a theory.
Answer: The answer is C. It is done because peer review and the consideration of an alternative explanation should be considered.
Explanation: this is the correct answer because when other scientist view other scientist work it is to indicate that the hypothesis and observations that they made is correct.
Answer:
C: It is done because peer review and the consideration of an alternative explanation should be considered.
Explanation:
I just took the test and got it right :)
Which letter from the fungus diagram represents the hyphae?
Answer:
C
Explanation:
Hyphae is the vegetative growth of fungi. It is long and filamentous in nature and is analogous to the rhizoids of runner plants. A network of many crisscrossing hyphae is called mycelium, When a hyphae branches vertically upwards to give rise to a sporangium, it is called a sporangiophore (such as the case in the attached diagram).
Answer: The correct answer is D
Explanation: to help others
Which describes an example of genetic engineering
Answer:
i think its C
Explanation:
Answer: The answer would be 2: Vitamin A is added to rice to combat blindness.
Explanation: With how genetic engineering works, any implentation from an external source into the genetic code of a substance or being, in this case rice and vitamin A, it is a deliberate alteration of the rice's make up to have something which it originally did not possess, thus the answer is 2.
What does karyon, as used in prokaryote, mean?
A.
cell wall
B.
cytoplasm
C.
nucleus
D.
ribosome
Answer:
C. nucleus
Explanation:
Karyon is a Greek word which means a kernel or nut and it depicts organisms that do not have a true nucleus. The shape of the nucleus was used in giving it the name karyon.
Prokaryotes are organisms that lacks a true nucleus and do not have membrane bound organelles.
Eukaryotes on the other hand have true nucleus with membrane organelles.
In the most common mode of reproduction, fungi produce and release _______, which are involved in both sexual and asexual reproduction.
Answer:
spores
Explanation:
Which product do petroleum resources provide in addition to energy? plastic aggregate nickel cardboard
Plastic. (Petroleum can provide the raw material for making plastic)
Answer:
Plastic
Explanation:
What is binary fission?
As the ocean becomes more acidic, what is happening to the coral reefs underwater?
A)They are growing out of control and are taking over the ocean.
B)The acid is giving them more color to camouflage from their predators.
C)They are giving the fish around them diseases.
D)They are slowly dissolving, leaving the rest of their food web without a source of food.
The rising acidity of the oceans threatens coral reefs by making it harder for corals to build their skeletons. A new study identifies the details of how ocean acidification affects coral skeletons, allowing scientists to predict more precisely where corals will be more vulnerable.
I’m pretty sure it’s B
what type of cells are made from a secondary oocyte?
Answer:Ovarian
Explanation:
Answer: A secondary oocyte undergoes the second meiotic cell division to form a haploid ovum if it is fertilized by a sperm. Oogenesis begins with oogonia (singular, oogonium), which are the immature eggs that form in the ovaries before birth. Oogonia are diploid cells and are equivalent to spermatogonia in males.
Explanation:
what is a kingdom
A. Animalia
B. Eukarya
C. Mammalia
D. Prokarya
D. Animalia is a kingdom.
It is one of the three Kingdoms of Eukarya.
The correct answer is A
Select all that apply.
Lipids _____.
The consist of fats and things so the answer would be the first one:)
Consists of fats,phospholipids, and steroids
A(n) ___ forms along the boundaries where two contrasting air masses meet
I believe the answer is a front
Answer:
Air Front
Explanation:
The transition zone between two distinct air mass is known as the front. The presence of the air front in an area indicates the change in the weather pattern causing heavy rainfall, thunderstorms, hurricanes, tornadoes, and blustery wind.
This air front is mainly divided into 4 types. They are as follows-
(1) Warm air front- In this type of front, the warm air replaces the cold air mass.
(2) Cold air front- In this type of front, the cold air replaces the warm air.
(3) Occluded air front- When a warm air mass occurs in between two cold air mass, then it is known as the occluded air. It results in heavy rainfall and powerful wind.
(4) Stationary air front- When both the warm and cold air occurs simultaneously and there occurs no replacement of one another, then it is known as the stationary type of air front.
In the human body, what are systems made of?
O
A. A group of tissues
O
B. A group of organs
O
C. A group of cells
U
D. A group of reactions
SUBMIT
The human body is made up of 11 systems of organs.
The systems are: Circulatory, respiratory, digestive, excretory, nervous, endocrine, immune, integumentary, skeletal, muscle, and reproductive.
In the human body, systems are made up of a group of organs. So, the correct option is B.
What do you mean by Organs?Organs may be defined as a collection of tissues to form a specific structure that is required to perform a definite function in the body of an organism.
There are nine major organ systems present in the human body. They are the circulatory system, the digestive system, the nervous system, the reproductive system, the excretory system, the respiratory system, the integumentary system, the musculoskeletal system, and the endocrine system.
These organ systems play a specific role in order to provide suitable conditions for the survival of human beings.
Therefore, in the human body, systems are made up of a group of organs. So, the correct option is B.
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What two fundamental characteristics distinguish animals from plants?
o eliminate the possibility of hidden or unknown variables, the scientist must run a _______ experiment.
A) control
B) preliminary
C) test
D) variable
Answer:
To eliminate the possibility of hidden or unknown variables, the scientist must run a Controlled experiment.