Answer:During pregnancy, red blood cells from the unborn baby can cross into the mother's blood through the placenta. If the mother is Rh-negative, her immune system treats Rh-positive fetal cells as if they were a foreign substance. The mother's body makes antibodies against the fetal blood cells
Explanation:
hans and zacharias janssen contribution to cell theory
Answer:
1590’s
What year did Hans and Zacharias Janssen contribute to the cell theory? Hans and Zacharias Janssen are known for inventing the compound optical microscope. They made it in the 1590’s. This contributed to “The Cell Theory” by making it easier and more practical whilst observing cells.
Explanation:
Cell theory states that all biological organisms are made up of cells, which is the structural and functional unit of life.
Scientists Hans and Zacharias Janssen invented the compound microscope that played a vital role in observing cellular functions.
Hans and Zacharias Jansen invented the compound microscope, which consisted of the eyepiece and an objective lens.
The scientists discovered the compound microscope in the late 16th century, which then helped many scientists to magnify and observe the microscopic structures.
Thus, the Janssens discovered the compound microscope.
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The _______ variable is what the experimenter manipulated/changes to see the effect
inn
recut
Answer:
independent variable
Explanation:
what are the functions of the kidney
the cytoplasm of a skeletal muscle cell has a specific name and is known as
Answer:
Explanation:
A skeletal muscle cell is surrounded by a plasma membrane called the sarcolemma with a cytoplasm called the sarcoplasm. A muscle fiber is composed of many fibrils, packaged into orderly units.
ribozymes are rna molecules that have enzymatic activity. this conflicts with the belief of early molecular biologists that
Ribozymes conflict with the belief of early molecular biologists that each enzyme is a polypeptide. A ribozyme is composed of RNA.
A ribozyme (ribonucleic acid enzyme) is an RNA molecule capable of speeding up a chemical reaction.
In consequence, ribozymes have catalytic activity.
For example, within the ribosome, the large subunit of ribosomal RNA acts as a ribozyme that links amino acids during the synthesis of polypeptide chains.
On the other hand, enzymes are specific proteins (composed of amino acids) that can speed up chemical reactions.
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The cell membrane is said to be semipermeable because
Answer:
it is made of phospholipid bilayer along with other various lipids, proteins, and carbohydrates
the effects of epinephrine are typically observed within
Answer:
70mins
Explanation:
i don't have one I just know
What is the definition of epistasis?
A. when the allele of one gene changes the phenotype of another gene
B. when the allele of one gene masks the genotype of another gene
C. when the allele of a gene changes the phenotype of another allele of that gene
D. when the allele of one gene masks the phenotype of another gene
The definition of Epistasis in gene biology is Choice D: when the allele of one gene masks the phenotype of another gene
Definition:
When the phenotypic effect of alleles at one gene are masked by alleles of another gene.
In essence, a gene is said to be epistatic when its presence suppresses the effect of a gene at another locus.
It is important to know that Epistatic genes are often called inhibiting genes because of their effect on other genes which are described as hypostatic.
Additionally, there are six common types of epistasis gene interactions:
Dominant Dominant inhibitory, Duplicate dominant, Duplicate recessive, Polymeric gene interaction, Recessive.Read more:
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What will happen to a population of organisms that are in an oxygen rich environment. (Double click the story board to draw on it)
Answer:
it will disolve
Explanation:
during the process of ________, an existing tissue is replaced by bone.
how are relative time and absolute time applied to studying the geologic time scale?
Answer:
Relative time is the physical subdivision of the rocks found in the Earth's geology and the time and order of events they represent. Absolute time is the measurement taken from the same rocks to determine the amount of time that has expired.
True or False: The mixture of gas that you breathe out does NOT contain any oxygen.
* its false
Answer:
false
Explanation:
How does the greenhouse effect help to explain earths climate
Answer:
the greenhouse effect helps keep Earth's temperature up.
without greenhouse gasses Earth would be uninhabitable.
Brainliest?Explanation:
What did Robert Hooke use to discover cells?
Answer:
A microscope
Explanation:
He observed through a microscope and discovered cells.
Answer:
i belive he used the first microscopes but im not positive that is what your asking
Explanation:
s
Which statement correctly demonstrates the relationship between cellular respiration and photosynthesis?
A: The ATP produced by all cells during cellular respiration can be used by plant cells to produce water molecules during photosynthes
B: The glucose produced by plant cells during photosynthesis can be used by all cells to produce ATP during cellular respiration.
C: The oxygen produced by all cells during cellular respiration can be used by plant cells to produce glucose during photosynthesis.
D: The water molecules produced by plant cells during photosynthesis can be used by all cells to produce oxygen during cellular O respiration.
Answer:
your answer is B. The glucose produced by plant cells during photosynthesis can be used by all cells to produce ATP during cellular respiration.
Explanation:
Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
PLZ THIS IS URGENT HELP
Which of the following genetic crosses follows the Mendelian inheritance?
A) P generation: brown lab x black lab; F1 generation: yellow lab
B) P generation: A blood x B blood; F1 generation: AB blood
C) P generation: Red-eyed fly x Red-eyed fly; F1 generation: White- eyed fly
D) P generation: Widows peak x straight hair-line; F1 generation: Widows-peak
Explanation:
The key principles of Mendelian inheritance are summed up by Mendel's three laws: the Law of Independent Assortment, Law of Dominance, and Law of Segregation.
what is occurring during the s phase of the cell cycle?
During S phase (synthesis), DNA replication takes place. Completion of DNA synthesis is followed by G2 phase during which cell growth continues and proteins are synthesized in preparation for mitosis. S page lasts for 8 hours approximately.
1 pts Question 3 The transfer of glucose into a cell does not require ATP. What type of transport supplies a cell with glucose?
O exocytosis
O osmosis
O passive transport
O active transport
Answer:
A exocytosis
Explanation:
got it right on quiz
Cholera bacteria causes sever diarrhoea. These bacteria spread rapidly when sewage is not piped away. Why is this?
Answer:
Because cholera bacteria rapidly multiplies in areas with improper sanitation and untreated water that people can drink.
When people drink this water, they get severe diarrhoea.
how fast does a body decompose to skeletal remains?
Answer:
Timeline. In a temperate climate, it usually requires three weeks to several years for a body to completely decompose into a skeleton, depending on factors such as temperature, humidity, presence of insects, and submergence in a substrate such as water.
Explanation:
6. explain the relationship between enzymatic active sites & the
catalytic cycle of an enzyme
Answer: To catalyze a reaction, an enzyme will grab on (bind) to one or more reactant molecules. These molecules are the enzyme's substrates. ... The part of the enzyme where the substrate binds is called the active site (since that's where the catalytic “action” happens). A substrate enters the active site of the enzyme.
Explanation: Hope this helps.
microorganisms are found in nearly every environment and are said to be
Answer: microorganisms are found in nearly every environment and are said to be ubiquitous
Explanation:
Have a nice study time
Question 4 of 25
How are photosynthesis and cellular respiration related?
A. Cellular respiration is the process animals use to produce glucose, while photosynthesis is the process plants use to produce glucose
B. The products of photosynthesis are the reactants of cellular respiration
C. Photosynthesis produces water molecules, while cellular respiration splits water molecules apart.
D. Cellular respiration provides the energy for photosynthesis.
Answer:
B. The products of photosynthesis are the reactants of cellular respiration.
Answer: I think its B.
How is the word Representation used in a sentence
Answer:
A graphical representation of results is shown in figure 1. 17. He gave a talk on the representation of women in 19th-century art. ... He is writing a book on the representation of woman in medieval art
how do potassium channels select the ion that can travel through the channel? group of answer choices membrane-spanning subunits concentration pore loop voltage
Answer: Potassium channels allow K+ ions to easily diffuse through their pores while effectively preventing smaller Na+ ions from permeation. ... This selection process occurs at the narrow selectivity filter that contains structurally identified K+ binding-sites
Explanation:
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List 4 examples of limiting factors described in the reading and label each if it would be considered an abiotic or biotic limiting factor.
Answer:
Explanation:food, water, habitat, and mate.
Limiting factors can be either abiotic or biotic. Examples: Abiotic → water, pH, radiation, salinity. Biotic → predation, competition, parasitism.
What are biotic and abiotic factors?The ecosystem is composed of living and non-living elements that interact and depend on each other. These are the biotic and abiotic factors.
• Abiotic factors are physical and chemical components of the ecosystem. These are the non-living elements.
• Biotic factors are all the living components in the ecosystem.
Biotic and abiotic factors influence the survival and reproduction of living beings.
What are the limiting factors?Limiting factors are environmental conditions that act directly on populations and individuals, limiting their distribution and growth.
These factors might be either biotic or abiotic and affect natality and mortality rate, migration, etcetera.
Limiting factors might be a result of the population density or might be dense-independent.
When talking about dense-independent limiting factors we are referring to
abiotic factors, such as temperature, pH, salinity, humidity, radiation, etcetera.natural disasters like fires, volcanic eruptions, flooding, etceterahuman impactWhen talking about dense-dependent limiting factors we are referring to biotic factors and the interactions established between species that control other species' growth.
These are, for instance,
competition, parasitism, and predation
Each species carries out a different role in these interactions.
These relationships and the results are what determine the destiny of the populations and their size.
Now, since I do not have the text, I will suggest a few examples of limiting factors. Take a look at them and then look for some other examples in your reading.
Limiting biotic factors:
predatorcompetitorparasitesLimiting abiotic factors:
waterpHradiationsalinityFollowing this framework, you should look in your reading which limiting factors are described.
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how can an understanding of osmosis be important in developing methods for the same storage of food?
Osmosis is also used for preserving fruits and meats, though the process is quite different for the two. In the case of fruit, osmosis is used to dehydrate it, whereas in the preservation of meat, osmosis draws salt into it, thus preventing the intrusion of bacteria.
A cooler area appearing from time to time on the sun's surface, appearing dark by contrast with its surroundings.
Answer:
Are you talking about a sunspot?
Explanation:
One of the most common plants in Atlantic salt marshes is cordgrass. periwinkle snails cling to the top of tall cord grass is during high tide. The tall cord grass is provide protection from the snails predators such as blue crab. well the snails do not be directly on cordgrass the snails can damage the cord grass when they grays and algae and fungi that grow on the grasses. if the snail populations grow too large they can decrease cord grass growth.
Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails. Hence option B is correct.
Biotic factors - The living components or the living things that are present in the ecosystem that shapes the environment are known as biotic factors. Examples are plants, bacteria, algae, birds, fishes etc.
A ecosystem runs through the interaction of biotic and abiotic component. Biotic supplements acts as a fuel that supports the bacterial growth.
Periwinkle snails graze on the top of the cordgrasses to escape from their predators blue crab. They graze on the fungi and algae that is inhabitant on top of the grass, they do not feed directly on the cordgrass
While grazing they actually damage the cordgrass by spreading the fungal infection.
Hence, option B is Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails is correct.
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The correct question is :
One of the most common plants in Atlantic salt marshes is cordgrass. Periwinkle snails cling to the top of tall cordgrasses during high tide. The tall cordgrasses provide protection from the snails’ predators, such as the blue crab. While the snails do not feed directly on the cordgrass, the snails can damage the cordgrass when they graze on algae and fungi that grow on the grasses. If the snail population grows too large, it can decrease cordgrass growth.
Question
Based on the passage, which of the following describes the ecological role that cordgrass serves for the snails?
Responses
A. Cordgrass is a biotic factor for the snails because it is the snails’ main food source.
B. Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails.
C. Cordgrass is an abiotic factor for the snails because it provides habitat for the snails and crabs.
D. Cordgrass is an abiotic factor for the snails because it produces algae and fungi for the snails.
Explain how the method of nutrition used by wild pine differs from the method of nutrition used by other organisms (animals)
Answer:
Most plants are auto trophic able to use sunlight as their primary source of energy,in a process called photosynthesis.This process enables them to turn carbon dioxide from the air into food,The carbon and oxygen which they need in order to build up their bodies ultimately comes from this carbon dioxide.
All animals are heterotrophs, which means that they cannot make their own food as plants do. Rather, animals must obtain the energy, carbon, hydrogen, oxygen, nitrogen, and minerals they need by consuming other living things. Animals are also animate, which means that they are capable of movement.
