Spermatophyte is the term that describes the two groups of plants that do not need water to reproduce.
Water is not necessary for fertilization or reproduction in spermatophytes since siphonogamy occurs where the male gametes are transported via the pollen tube. Siphonogamy is a condition in plants in which the male cells are transferred to the eggs via the development of pollen tubes. Seed plants are often siphonogamous.
Spermatophyte is a group of plants including gymnosperms and angiosperms. Gymnosperms are cone-bearing plants, while angiosperms are flower-bearing plants. They reproduce sexually through the means of seeds.
Spermatophytes initially develop pollen for fertilization. The pollen is then transferred to the ovary via pollen tubes, resulting in the production of seeds. Pollen is transferred by vectors like air, any insect, etc. Thus, they do not require water for reproduction.
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Define a hybrid fish
Answer:
Scientists accidentally bred a hybrid fish called the sturddlefish The sturddlefish is a hybrid of a sturgeon and a paddlefish, and scientists created this new creature on accident. Forward 15 seconds Back 15 seconds
Explanation:
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The timing of _____ is a feature that distinguishes cam and c4 photosynthesis.
Answer:
stomatal opening
Explanation:
7th grade science
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Answer:
Eukaryotic because it has a nucleus
Explanation:
The model shows a nucleic acid. Which is one function of the nucleic acid? It helps code for proteins. it help synthesize DNA It provides energy to the cell.. It helps synthesize DNA. It helps synthesize DNA. It is a major component of the cell membrane. It is a major component of the cell membrane.
Answer:
The correct answer is - It helps code for proteins.
Explanation:
Nucleic acids are biomolecules that are essential for all life forms, they are of two major types RNA and DNA. In RNA the sugar is ribose whereas in DA deoxyribose sugar is present.
Nucleic acids are helpful in protein synthesis in both types of cells and all organisms. These biomolecule codes for the protein and makes the polypeptide chain made up of amino acids with the help of mRNA and tRNA with ribosomes.
Your science class has taken swabs throughout the school. The image shows the petri dish containing a bacterial culture that developed from a swab of one computer keyboard in the classroom. You would like to make a detailed observation of the internal structures of the bacteria in your culture. You know that In order to see just their shape, it is necessary to use a magnification of about 400x to 1000x. Based on this, develop a logical argument for using a transmission electron microscope.
The TEM magnifies 1,500,000X and produces a 3D image.
In order to keep the students safe, the bacteria must be dead before viewing with any microscope.
The TEM magnifies up to 2000,000X and you can see great detail including the internal structure of cells.
The TEM produces a 2D image of whatever specimen you are viewing.
A logical argument for using a transmission electron microscope (TEM) is: C. The TEM magnifies up to 2000,000X and you can see great detail including the internal structure of cells.
What is a microscope?A microscope can be defined as an optical device that is typically designed and developed to produce an enlarged (magnified) image of a minute (very small) object, in order to show all the littlest and tiniest details about the object that cannot be seen by the natural human eye.
The types of microscopes.In Science, there are different types of microscopes and these include the following:
Scanning electron microscope.Polarizing microscopeInverted microscopeCompound light microscope.Transmission electron microscope.Ideally, a magnification of about 400x to 1000x is required to see the shape of a bacterial culture. However, a transmission electron microscope (TEM) can magnify up to 2000,000X and as such you can see great detail of a bacterial culture, including the internal structure of their cells.
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Anemophily takes place by:
(a) By Bird
(b) By Bat
(c) By Snail
(d) By Wind
Answer:
(d) wind
Explanation:
Anemophily is the process by which pollen is transported from one plant to another via aer currents. Wind pollinates approximately twelve percent of the world's flowering plants, including grasses, cereal crops, many trees, and the notorious allergenic ragweeds.
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A woman has only daughters. Analyze the situation genetically and provide a suitable explanation.
Answer:
If a woman has only daughters then the father must have passed the X chromosome that fertilised the egg each time
The ear canal is found on what bone
Explanation:
ear bone, also called Auditory Ossicle, any of the three tiny bones in the middle ear of all mammals. These are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup.
Answer:
the temporal bone
Explanation:
hope it helps sorry if I'm wrong
Please help! The best answer gets brainliest! I'll also appreciate it if you explain it! :D
Question: A scientist looking at animal fossils from 400 million years ago might see the first appearance of which organism?
A. insects
B. amphibians
C. jellies
D. land plants
Answer:
B. amphibians
(B) Amphibians
Read the passage about the fluoridation of drinking water.
Since the early 1960s, fluoride has been added to many sources of drinking water to prevent cavities in teeth. This is called fluoridation. There are some who say that this is unnecessary and increases the risk of cancer.
In 1993, the Subcommittee on Health Effects of Ingested Fluoride of the National Research Council, part of the National Academy of Sciences, conducted an extensive study about the link between fluoridated drinking water and increased cancer risk. The study included data from more than 50 human disease studies and six animal studies. The Subcommittee concluded that none of the data showed a link between fluoridated drinking water and cancer. A 1999 report by the CDC supported these findings. The CDC report concluded that studies so far have produced "no credible evidence” of a link between fluoridated drinking water and an increased risk for cancer.
According to the article, what valid claim came from the National Research Council?
A. There is no link between fluoride exposure and increased cancer risk in humans.
B. There is a possible link between fluoride exposure and increased cancer risk in humans.
C. There is a definite link between fluoride exposure and increased cancer risk in humans and animals.
D. There is a possible link between fluoride exposure and increased cancer risk in animals.
Answer: A. There is no association between fluoride exposure and increased cancer risk in humans.
Explanation: just did it.
А_________ is any object that orbits a larger object
Answer:
The answer is satellite, give me brainliest answer pls:)
Answer:
An object that moves around another object in space is a
A natural satellite of a planet or asteroid. objects that orbit around a body in space that are not man made. ex. the earth is a natural satellite of the Sun, the moon is a natural satellite of Earth.
Explanation:
What causes burning rock and gas to explode out of a volcano?
Answer:
the first one
Explanation:
Where would you find the warmest waters?
deep zone
surface-mixed zone
transition zone
polar zone
Answer:
Surface Mixed Zone, because the warmest is at the surface so it'll get the most sunlight. etc. It *stays* the warmest because warm water is less dense than cool water. Layers in the ocean are very well-defined since the warm water on top will stay warm and the cold water stays cold.
Explanation:
Hope my answer helped :)
8. Which of these is a homogeneous mixture?
A. O milk
B. O tea
C. O sand on a beach
D. O sodium chloride
Explanation:
A. milk is my answer
Select all the correct answers.
Why are invasive species considered a threat to native wildlife. A they can breed and spread quickly. B they consume native species food supply. C they evolve and native species don’t. D they all have higher genetic diversity than native species. E they don’t need resources from the environment at native species do.
Answer:
The answers A and B.
Explanation:
Which statement is not an example of intercellular communication?
A A message is distributed across plasma membrane.
B A message travels between gap junctions.
C A molecule stimulates a target cell via a receptor.
D An electrical signal causes muscle cells to contract together.
Answer: The answer is A message is distributed across plasma membrane
Explanation:
I took the quiz
Answer: The answer is A message is distributed across plasma membrane
Explanation: trust me :)
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Answer:
They can live in both warm and cold, but they die faster in warm water.
The biomolecule described as having many high energy bonds, majority of the cell membrane,
and has more energy per gram than other biomolecules is a
aCarbohydrate
b. Glycerol
C. Fatty acids
d. Amino acids
Carbon has an atomic number of 6. Carbon 14 has _____.
Answer:
8 Neutrons
Explanation:
For example, carbon has six protons and is atomic number 6. Carbon occurs naturally in three isotopes: carbon 12, which has 6 neutrons (plus 6 protons equals 12), carbon 13, which has 7 neutrons, and carbon 14, which has 8 neutrons.
Alfred Wegener believed that all of the continents were originally: a. a single landmass called Pangaea c. three landmasses called Europe, Asia, and Gondwana b. two landmasses called Eurasia and Gondwana d. none of the above
its A
Explanation:Aquifers are _______. A. Located below the water table b. Important sources of freshwater c. Located in the saturated zone d. All of the above Please select the best answer from the choices provided A B C D.
Aquifers located below the water table, important sources of freshwater, and located in the saturated zone.
What are aquifers?
Aquifers are underground, present layers of rock or sand that bear water.
Aquifers are bodies of permeable rock or sediment that have been flooded by groundwater.
As rainwater penetrates through the earth, groundwater enters an aquifer.
It has the ability to migrate through the aquifer and reemerge via springs and wells.
Thus, the correct option is D, all of the above.
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Answer:
Explanation:
the answer is d I got it right
One of the reasons why it is so difficult to quit smoking cigarettes is that nicotine may lead to an increased activation of ________ neurons.
It is so difficult to quit smoking cigarettes is that nicotine may lead to an increased activation of dopamine neurons.
What is dopamine neurons?Dopamine neurons play an important role in the control voluntary movement and behavioral processes such as mood, reward, addiction, and stress.
This nicotine activates the dopamine neurons that begins the response that leads to feelings of pleasure and reward, and then addiction.
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What would I choose? Please help me!!??
Answer:
I believe your answer is B. Sorry if I am wrong.
Explanation:
I hope I helped
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What class of membrane-transport protein is associated with triggering an action potential?.
Answer:
A voltage-gated ion channel
Explanation:
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How do algae blooms destroy aquatic life?
depleting oxygen needed by organisms
by raising the water temperature
by getting into municipal water supplies
by giving off toxins that kill life
Answer:
A. Depleting oxygen needed by organisms
Explanation:
When the algae and bacteria in the algae bloom die, the decomposition process uses up most of the surrounding oxygen.
Question 19
Neurotransmitters are typically stored in which of the following parts of a neuron?
Answer:
Neurotransmitters are synthesized by neurons and are stored in vesicles, which typically are located in the axon ’s terminal end, also known as the presynaptic terminal. The presynaptic terminal is separated from the neuron or muscle or gland cell onto which it impinges by a gap called the synaptic cleft.
Explanation:
A cell undergoes mitosis three times. How many daughter cells are produced?
A. 16
B. 2
C. 4
D. 8
Answer:
B A cell is a undergoes mitosis time
Answer:
8
Explanation:
a cell with 20 chromosomes that undergoes mitosis three times will have 8 daughter cells produced .
Marty is developing a new way to heat an airplane's windshield to prevent it from accumulating ice when in flight. A thin layer of clear, conductive material is injected between two layers of thick windshield plastic. A very small electric current is run through the inner material to keep the plastic layers warm.
The question part that is missing is -
How might using a model help develop the design?
Answer:
The correct answer would be - it could be tested in a lab.
Explanation:
A model is a smaller representation or test unit for an idea, or a process that is which is used to test or explain the idea or process that can not be made multiple times on a large scale.
Developing a new method to heat an airplane's windshield to prevent it from ice accumulation when in flight, testing this new idea, is very risky in the actual plane during flight so testing this method in the lab on a model would be helpful.
What is the evidence that supports the autogenic hypothesis?
Answer:
Explanation:
The hypothesis is supported by the studies on mitochondria. The mitochondria contains its own DNA and sythesizes many of its RNA and proteins. The mitochondrial protein synthesis machine, the ribosomes are similar to those found in bacteria. Similar to the bacterial cells, the mitochondria also contain circular genome
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