Answer these questions
1. What are three examples of technology?
2. What is observation? Why is it important to scientists?
3. What role does critical thinking play in evaluating scientific evidence?
4. How is a scientific law different from a scientific theory?
5. How do you make an inference?
6. Contrast a hypothesis & a prediction.
7. Why are ethics particularly important in specific types of scientific investigation?
8. Define biology. Name 2 other branches of science.
Answer in complete sentences
how do scientist organize data?
I’m 1953, who developed the model shown below ?
All living things are made of one or more cells. Here are two types of cells: an animal cell and a plant cell. Sometimes when plants are under water stress, they wilt. Animals do not wilt! What analogy based on the plant cell structure explains wilting?
Answer:
Presence of cell wall around the plant cells.
Explanation:
An adequately hydrated plant cell is firm due to presence of turgor pressure. Loss of water results in loss of turgor and the plant cells become limp and exhibit wilting. Irrespective of loss of turgor, presence of rigid cellulosic cell wall around the plant cells maintain their structural integrity.
On the other hand, animal cells do not have cell walls around them which in turn do now allow them to maintain the structure after loss of water.
PLS HELP ASAP!!!!!!!!!!!!
Which is a true statement about air quality?
A Good air quality is shown by high levels of smog.
B Bacteria is a major cause of poor air quality.
C Water treatment plants measure the air quality.
D The EPA measures air pollution levels daily.
The statement which is true about air quality is: D. The EPA measures air pollution levels daily.
Air can be defined as an invisible mixture of gases that are having nearly constant concentrations and which surrounds the Earth.
The gases which makes up the air that surrounds the Earth include the following:
Nitrogen.Carbon dioxide.Oxygen.Hence, oxygen is one of the constituent gas of air that all living organisms such as humans and animals breathe in during respiration.
In this context, it is very important and essential that air is free from any form of impurities or pollutants, so as to avoid lung-related diseases.
In the United States of America, the Environmental Protection Agency (EPA) is a governmental agency that is saddled with the responsibility of ensuring air quality.
Therefore, the Environmental Protection Agency (EPA) measures the level of air pollution on a daily basis.
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DNA is not found in the nucleus of all eukaryotic cells. True false
The assertion that DNA is not found in the nucleus of all eukaryotic cells is incorrect. In fact, the nucleus of eukaryotic cells does contain DNA, which is essential for the cell's functioning and reproduction.
Explanation:The statement 'DNA is not found in the nucleus of all eukaryotic cells' is false. DNA, which stands for deoxyribonucleic acid, is indeed found in the nucleus of all eukaryotic cells. Eukaryotic cells, as opposed to prokaryotic cells, have a nucleus that contains their DNA. This DNA is responsible for the cell's genetic information and instructions for cell functioning and reproduction. This is a basic and universal characteristic of eukaryotic cells.
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I was wondering if someone could tell me if the reason why a water fleas heart rate is effected by temperature because it cold blood orrrrr??
distinguish between the cell wall and the cell membrane in a plant cell
Compare the functions of channel proteins and carrier proteins and facilitated diffusion
Why do you need your digestive system to live? Explain.
state one change in the composition of the blood as it flows through the respiratory system
Answer:
Respiratory system includes respiratory passage and respiratory organ i.e lungs.
Explanation:
The transport of gases occurs via blood medium. The deoxygenated blood is transported from heart to the lungs for exchange or oxygenation. As the blood flows through the respiratory system the carbon dioxide is exchanged with oxygen. The oxygenated blood is then transported to heart for further circulation to various body parts. Some amount of gases get dissolved in the blood plasma and transported, whereas some amount is transported in the bound state. Oxygen and CO2 bind with hemoglobin in RBC.
Describe a method you would use to separate chicken soup into other forms of matter from which it’s made
which of these is a base? A.vinegar B.NaOH C.HCL D.HNO3
HELP URGENT
Answer: NaOH
Explanation:
The base can be defined as the chemical species which has the ability to denote electrons, always ready to accept protons.
These species released hydroxide ions in the aqueous solution. Example: hydroxide of alkaline earth metals like sodium hydroxide, calcium hydroxide.
These reacts with acid to form salt and water. Turns the red litmus blue. Hence, the correct answer is option B.
A soybean plant uses cellular respiration to generate usable chemical energy, released within the cell as molecules of what substance
Answer: ATP
Explanation:
A soybean plant uses cellular respiration to get energy. it can be defined as the biological phenomenon by which the chemical energy in the glucose is converted in the form of ATP.
The glucose is broken down in mitochondria in the presence of oxygen and ATP production takes place along with carbon dioxide and water.
The ATP is the energy source which provides the cells energy for all the cellular process.
what happens a few days after fertilization (apex)
After fertilization, the conceptus forms a morula and then develops into a blastocyst that implants into the uterus. The outer cells of the blastocyst become the chorion, which releases hormones to support the developing embryo.
Explanation:Approximately 3 days after fertilization, the conceptus reaches the uterus and forms a structure called the morula. This compact mass of cells continues to divide and forms a ball of approximately 100 cells, known as a blastocyst. The blastocyst then implants into the wall of the uterus, and the outer cells develop into the chorion, which releases hormones to maintain the endometrium and support the developing embryo.
The blastocyst is a more complex structure, consisting of two distinct cell layers: the inner cell mass, which will give rise to the embryo, and the outer layer called the trophoblast. The trophoblast further differentiates into the chorion, which is a membrane that surrounds the developing embryo.
The chorion plays a crucial role in pregnancy. It releases hormones, including human chorionic gonadotropin (hCG), which helps to support the early stages of pregnancy by maintaining the corpus luteum in the ovary. This ensures a continued supply of progesterone, which is essential for sustaining the uterine lining and supporting the developing embryo.
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If a mineral leaves a red trail when scraped against an unglazed porcelain plate,which property of mineral is being measured?
The answer is color because it leaves a red trail
The Punnett square shows the possible genotype combinations of two parents who are heterozygous for a particular trait.
What is the probability of the parents having a child who is homozygous dominant for this trait?
0%
25%
50%
75%
The probability of the parents having a child who is hzygous dominant for this trait is - 25%
In the given question, there is a particular character that has two alleles Y dominant allele and y recessive allele. Both parents are heterozygous for the trait that is encoded as Yy cross with Yy.
Cross between: Yy X YyIf both parents carry only one copy of a recessive gene, the likelihood of a child have the recessive trait is one in four.Offspring are produced: YY: 2Yy: yyHozygous would be represented for dominant - YYthere is one YY out of 4 offsprings(1/4)*100
= 25%
Thus, the correct probability would be - 25%
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Based on the laws of probability, the probability of the having a child who is h0m0zygous dominant for the trait indicated in the Punnet square is 25%.
What is the probability of the having a child who is h0m0zygous dominant for the trait indicated in the Punnet square?Assuming the dominant trait is Y and the recessive trait is y.
From the Punnet square, the offspring genotype are: YY, Yy, Yy and yy.
The child having h0m0zygous dominant trait is YY.
Probability = 1/4 = 25%.
Therefore, the probability of the having a child who is h0m0zygous dominant for the trait indicated in the Punnet square is 1/4 or 25%.
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What would happen to the digestive system if the muscular system stopped working?
1 set of chromosomes is what? a. meiosis b. mitosis c. replication d. translation
what caused the light in the sky (northern lights) the core
What is the difference between structural and functional proteins? And please give a definition for both!
Meiosis is responsible for which stage in the alternation of generations?
A. Gametophyte to sperm
B. Egg to zygote
C. Sporophyte to spore
D. Zygote to mature sporophyte
E. Spore to mature gametophyte
Final answer:
Meiosis facilitates the transformation of the diploid sporophyte into haploid spores in plant life cycles, playing a critical role in the alternation of generations and genetic diversity.
Explanation:
The question relates to the role of meiosis in the alternation of generations within the life cycle of plants. In the context of alternation of generations, meiosis is responsible for transforming a diploid sporophyte into haploid spores. After reaching maturity, the diploid sporophyte undergoes meiosis to produce haploid spores, which then divide by mitosis to produce the haploid gametophyte, thereby continuing the cycle of alternation of generations. This process is essential for maintaining genetic diversity and is a fundamental aspect of plant reproduction.
Therefore, the answer to the question 'Meiosis is responsible for which stage in the alternation of generations?' is C. Sporophyte to spore.
Consider the following food chain: garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat. What happens to the other members of the food chain if the cat is removed?
If the cat is removed the population of birds will escalate and exceed the population of the snails that sustain them.
The food chain is a depiction of the feeding relationship that exists in an ecosystem. An ecosystem is a self-supporting unit in which materials and energy are exchanged.
The food chain is as follows;
garden plants --> snails ---> birds --->household cat. We can see that removal of the cat means that the population of birds will escalate beyond the available population of snails. This will lead to competition for food among the birds within the ecosystem. The population of snails will suddenly decrease due to increase in the number of their predators. The number of garden plants will also increase due to the decrease in snail population.
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Three students each added equal volumes of pond water to four beakers and placed each beaker in a different water bath. Each student maintained the water baths at temperatures shown in the data table below. The students then added an equal number of water fleas to each of the four beakers. After one hour, the students used microscopes to determine the average heart rate of the water fleas. The procedure was repeated for a total of three trials at each temperature. The results of the investigation are summarized in the data table below.
Which component of the experiment above is the independent variable?
number of trials
water temperature
average water flea heart rate
number of fleas per beaker
Answer:
water temperature
Explanation:
When performing a scientific experiment, you need to know what the dependent and independent variables are.
An independent variable is one that influences, causes a result in the dependent variable. This variable does not depend on any factor to be established.
The dependent variable, on the other hand, depends on the independent variable to be established. This is because this variable only shows one result, in relation to the influence that the independent variable had on it.
In the question above, we can see that the students were wanting to determine what the influence of water temperature was on the average heart rate of water fleas. With that, we can say that the water temperature is the independent variable.
what observable characteristic could be used to identify this rock sample as gneiss
Gneiss can be identified by its foliated texture with alternating bands of light and dark minerals, and sometimes eye-shaped quartz masses known as augen; it is a high-grade metamorphic rock formed from schists or granites.
Explanation:The observable characteristic that could be used to identify a rock sample as gneiss is its distinct foliated texture. Gneiss is a high-grade metamorphic rock characterized by alternating bands of light and dark-colored minerals, typically quartz and biotite mica. The surface of gneiss may also feature augen, which are eye-shaped masses of quartz that give rise to the term augen gneiss. This rock typically forms from the metamorphism of schists or granites and is a product of high-grade metamorphism, where minerals have segregated into distinct layers due to intense heat and pressure.
Final answer:
The observable characteristic that can be used to identify the rock sample as gneiss is the presence of alternating bands of light- and dark-colored minerals.
Explanation:
The observable characteristic that can be used to identify the rock sample as gneiss is the presence of alternating bands of light- and dark-colored minerals. Gneiss is a high-grade, foliated metamorphic rock, and these alternating bands are a result of the intense metamorphism that has caused minerals to self-segregate into discrete zones. In the case of gneiss, the bands are often composed of minerals such as quartz and biotite mica.
What are tectonic plates and how do they work?
Plate tectonics is the study of movement of the Earth's plates, called tectonic plates. A tectonic plate is a huge, irregularly shaped slab of solid rock. They are commonly composed of continental and oceanic lithosphere. Weather, as well as others, cause tectonic plates to slide, this causes a slight shake, volcanoes or earthquakes.
What might happen in a community if farmers did not plant legume crops
The weight of a person on Earth_____.
1.decreases as the distance from the center of the Earth decreases
2.increases as the distance from the center of the Earth increases
3.decreases as the distance from the center of the Earth increases
4.temains constant no matter the distance from the center of Earth
Answer:
Your answer is- 3 decreases as the distance from the center of the Earth increases
Explanation:
Which monomer makes up a polypeptide?
fatty acid
phospholipid
polyunsaturated fat
amino acid
amino acid is the answer
brown bears gain weight during the summer months so they can hibernate during winter. is it adaptation or acclimation
Explains how brown bears gaining weight for hibernation is an example of adaptation, utilizing fat reserves for survival during winter.
Brown bears gaining weight during summer to hibernate in winter is an example of adaptation. This behavior allows them to store energy reserves in the form of fat to survive months without food during hibernation.
Grizzly bears, like polar bears, accumulate fat during summer when food is plentiful and rely on it as an energy source when hibernating in winter. This process exemplifies how animals adapt to changing environmental conditions.
In biomes with cold climates, animals like bears utilize insulation in the form of fur and fat as a survival strategy to endure harsh winter conditions.