Answer:
a. primary oocyte arrested prior to ovulation >> 44 Chromatids
b. spermatozoa >> 23 Chromatids
c. oogonium prior to S phase >> 92 Chromatids
d. secondary polar body >> 23 Chromatids
Explanation:
An immature ovum can be defined as a cell that after oogenesis produces an ovum. The development of an immature ovum involves the following stages: oogonium (46 chromosomes, 2 chromatids), prymary oocyte (46 chromosomes, 4 chromatids), secondary oocyte (23 chromosomes, 2 chromatids), ootid (23 chromosomes, 1 chromatid) and mature ovum (23 chromosomes, 1 chromatid).
The secondary oocyte after the second meiotic division produces a mature ova and a secondary polar body (haploid, 23 chromosomes, 1 chromatid), which generally is not fertilized.
The spermatozoa are male haploid gametes (23 chromosomes, 1 chromatid) developed from germ cells.
why do we have to study cells?
because cell is the basic structural and functional unit of life.
Explanation:
there is no life which can exist without cell
does sexual selection result in organisms becoming optimally adapted to their environments? Explain your reasoning
Answer:
yes, sexual reproduction leads to the selection of better individuals for a particular environment
Explanation:
Natural selection can be defined as a mechanism associated with the survival and reproduction of individuals better adapted to their environment. Sexual reproduction is able to increase genetic variation, which is the primary source on which natural selection works. In consequence, individuals that exhibit an evolutionary adaptive phenotypic variant will have more chance to survive and to reproduce than those individuals with other less adaptive traits, thereby leading to evolution of the population and tending to optimize phenotypic variants for particular environmental conditions.
A substance has a volume of 20 ml and a density of 2.5 g/ml.What is it mass? A:0.125g ,B:8g, c:22.5g or D:50g
Answer:
D. 50g
volume : 20ml
= 0.02 l
density : 2.5g/ml
= 2500 g/l
therefore, p=m/v
m= p x v
= 2500 x 0.02
= 50
Centimeters
A farmer is collecting data about one of her cows. Which of the following points
types of data is an example of qualitative data? Select all that apply. *
The color of the cow
The number of pairs of chromosomes in each of the cow's body cells
The body temperature of the cow
nne
The age of the cow
Answer:
The color of the cow
The body temperatire of the cow
The age of the cow
Explanation:
Qualitive data involves using your senses to observe.
In physics a players natural resistance to an unbalanced force is called?
Answer:
if a players natural resistance to an unbalanced force is called unbalanced force
The space between leaves on a stem is called
Explain how the nucleus Observed in cheek cell
Answer:
The nucleus at the central part of the cheek cell contains DNA. When a drop of methylene blue is introduced, the nucleus is stained, which makes it stand out and be clearly seen under the microscope.
Copied
Answer:
The cell has different parts, and those that can absorb stains or dyes are referred to as chromatic. Having absorbed the stain, these parts of the cell become more visible under the microscope and can therefore be easily distinguished from other parts of the same cell.
Without stains, cells would appear to be almost transparent, making it difficult to differentiate its parts.
Explanation:Methylene blue has a string affinity for both DNA and RNA. When it comes in contact with the two, a darker stain is produced and can be viewed under the microscope
What two commandments from god can we obey by a biblical approach to science
Answer:
Here are some. I discovered that the clean and unclean food and hygiene laws found in the Book of Leviticus have been based all this time on the God of Abraham's working knowledge of the germ theory of disease and the modern human body and other advanced fields of science unknown to mankind at that time and some fields of science still unknown to mankind today. These laws and instructions still apply to modern times for all humans to follow to help keep our bodies healthy and disease free until we grow old and die of old age.
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How has the earth changed over time? 50POINTS ANSWER FAST!! :)
observation and inferences are important in science.How would you explain the difference between the two words?
The two main classes of skeletal muscle relaxants are
peripheral acting, centrally acting
O CNS acting, PNS acting
autonomic acting, sympathetic acting
O direct acting, centrally acting
CNS acting, PNS acting
autonomic acting, sympathetic acting
What statement is true of all living organisms?
Answer:
All living organisms respond to stimuli.
All living organisms can reproduce.
Which of the following best describes the large evolutionary changes that take place of thousands to millions of years and produce evolutionary novelties such as feathers in birds and large brain sizes in hominids? (type 1, 2 or 3 in the blank).
1. microevolution
2. macroevolution
3. genetic divergence
Answer:
2. macroevolution
Explanation:
Macroevolution refers to the evolutionary processes that lead to the appearance/extinction of groups larger than individual species. Macroevolutionary processes include speciation, species selection and punctuated equilibrium. The punctuated equilibrium processes are represented by phenomena such as those cases described above. These evolutionary processes are concentrated in relatively short speciation phases caused by bursts of evolutionary changes, which are then followed by stages characterized by evolutionary stasis.
When the inspiratory muscles relax, the rib cage returns to its original position as a result of:__________.
a) gravity.
b) exhalation.
c) elastic rebound.
d) partial pressure difference.
e) accessory muscle contraction.
Answer:
The correct answer is c) elastic rebound.
Explanation:
When the muscles are relaxed (end of expiration) the lung and the chest wall act in opposite directions, the lung tries to reduce its volume due to the inward retraction of the alveolar walls and the chest wall tends to increase in volume due to elastic expansion, these opposing pressures are responsible for keeping the alveolus partially open (functional residual capacity). The muscles of inspiration act by increasing the volume of the thoracic cavity causing the intrapleural pressure to become lower (Boyle's law), the intraalveolar volume increases and then the intralveolar pressure decreases below atmospheric (negative) and flow is generated towards the lung expanding it, that is, during inspiration, the diaphragm contracts moving downward, allowing the rib cage to widen and air into the lungs.
An
An example of a slow change caused by plate tectonics is
example of a rapid change caused by plate tectonics is
O climate change; precipitation
O mountain building; an earthquake
o the lithosphere; the molten core
O a volcanic eruption; oceanic crust
Answer:
B, Mountain Building; An Earthquake
Explanation:
when scientists have made many observations and collected existing data, they suggest a possible explanation for what they have seen and recorded. this explanation, called a hypothesis, is a statement that both explains their observations and data and can be tested. hypothesizing is a very important step in scientific investigations. a statement is testable if evidence can be collected that either supports or disproves it. a hypothesis may be shown to be wrong, but it can never be proved true beyond all doubt. it can only be supported by evidence. at any time, new data might indicate that a previously accepted hypothesis does not hold true in all instances. scientists often must refine and revise their original hypotheses—or even discard them—as they uncover new evidence. to test a hypothesis, scientists make a prediction that logically follows from the hypothesis. a prediction is a statement made in advance that states the results that will be obtained from testing a hypothesis, if the hypothesis is true. a prediction most often takes the form of an “if-then” statement. a hypothesis is often tested by carrying out an experiment. experimenting is the process of testing a hypothesis and its predictions by gathering data under controlled conditions.
Question
1- What key vocabulary terms are contained in this passage?
2- give the meaning of these terms.
The chapter gives definitions for essential terminology used in scientific inquiry, such as hypothesis, testable, evidence, revision, prediction, and experiment, as well as information on their relevance.
What might possibly account for an observation that can be verified by science?A hypothesis is a speculative explanation that can be verified by more research. A hypothesis is a well-supported explanation for the findings.
What is an observation's hypothesis?After making an observation, a scientist tries to explain what they have noticed. An explanation for an observation is a hypothesis. Always take into account at least one alternative. The alternative theory postulates that a certain cause leads to a particular effect.
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Which show that the results of an experiment are relible
The question is incomplete as it lacks the apropriate group of choices to answer this, however, the group of choices are as follows:
A. The experiment creates ideas for new experiments.
B. The experiment supports the hypothesis.
C. The experiment can be repeated with the same results.
D. The experiment uses a very simple procedure.
Answer:
The correct answer is : B. The experiment supports the hypothesis.
Explanation:
Hypothesis is a possible explanation for the reason of any natural process to be occurred. Hypothesis can be proved with the help of scientific experiment and supported by the various evidences and data analyzed with scientific method.
Reliability of an experiment can be shown by the repetitive results of performed experiment that satisfies the hypothesis and its parts if it does not supports it is false hypothesis.
Thus, the correct answer is : B. The experiment supports the hypothesis.
when plents use sunlight to make food, the energy of sunlight is
Answer:
your answer would be transformed.
Use Structure What could be a first step to
solving the equation 3x + -0.5(x + 3) + 4 = 14?
Explain.
Answer:
negative 17/7
Explanation:
this is the answer
Directions: Identify the differences between a fresh cut and a healed cut in the fruit.
Answer: browning
Explanation: a healed cut will have brown around it, a fresh cut will not have brown
Answer and explain plz:)
Hey There!!
The answer to this is: C) a factor that may affect an experiment or investigation. This is the best answer. A and B can be eliminated. D describes a controlled variable which is more specific than a scientific variable, thus C is the best answer. It is the best description of just a scientific variable. And, The second one is B: Robert Hooke was a famous scientist who experimented with springs (metal coils). He found that the farther you stretched the spring, the larger the force with which the spring pulled back on you.
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This is a high school Biology class taught by teacher Ellen Quigley. The students will soon be taking the state End of Course Biology exam. Notice the word chart on the bulletin board with vocabulary specific to Biology. What other information is posted in the room and/or on the white board
Answer:
Please see below
Explanation:
The white board displays helpful info with regards to a QR scanner associated with the day's lesson plan. The shelves on the far end of the classroom holds up relevant books and other objects that will prove educational for the students. Some schedules have been put up too for the ease of the students.
which stain is used to prepare an on onion peel is a slide why do we stain the onion peel
Explanation:
Safranin is used to prepare an onion peel slide. Explanation: We use this strain because this strain can differentiate the region of the cells darker than the other regions.
What are immortal cell lines and why are they important for cell research? (APEX diversity in science ws)
Which vein drains blood from the left side of the thorax and esophagus into the left brachiocephalic vein
Answer:
hemiazygous vein must be the answer
Joe has been diagnosed with major depressive disorder. He interprets negative stressful events using a pessimistic explanatory style. This explanatory style creates a hopeless, depressed state, which then hampers the way he thinks and acts, causing more negative stressful events. Joe's depression is thus, at least in part, due to:
state-dependent memory.
rumination.
a biochemical imbalance.
indicators of depression.
Answer:
Vicious cycle, state dependent memory rumination.
Explanation:
It is state dependent memory rumination and it is due to vicious circle because vicious circle refers to a situation or events that lead to difficulties or problem and the difficulties also lead to another difficulties and these continue on and on or it continue to repeat itself. Joe's negative disorder create the problem of negative stressful interpretation, which then lead to more depressive state and affect the way he think and acts.
It is state dependent memory rumination because Joe interpret negative stressful events based on how his mindset ruminate and process information.
A molecule composed of amino acids joined together. It contains nitrogen in addition to CHO
Answer:
This question describes a PROTEIN
Explanation:
Proteins are one of the four biological molecules in living systems. It is a biological polymer composed of monomeric units called amino acids, which are chemically joined together by peptide bonds.
An amino acid structurally consists of a central carbon atom bonded to an hydrogen atom, carboxylic acid group (-COOH), an amine group (-NH2) and a R side chain, which distinguishes one amino acid from another. Since all amino acids have a nitrogen-containing amine group, all proteins also contains nitrogen in their structure. Hence, a protein consist of an hydrocarbon (CHO) with a nitrogen atom.
2. Think and answer
(1) A shooter hunted a bird and one of its wings got injured. Will the bird be able to
lly now? Why or why not?
Explanation:
Yes,it is possible upon the type of bird that got injured.The bird will try its best tp fly and to escape from there
According to the graph, what condition is best for enzyme
activity?
A. A temperature below 30°C
B. A temperature of 35°C
C. A temperature above 50°C
D. A temperature of 20°C
According to the graph, A temperature of 35°C where the peak is highest and the enzyme activity is higher which means the temperature is optimum for the enzyme activity.
What is the optimum temperature for an enzyme ?It is the temperature at which the enzyme gets activated in order to bind with the substrate such that it is ready to change it into product.
Here in this graph of reaction the rate of reaction is the highest peak that is the maximum of amount of reactants is changed into products. The rate of reaction is highest at this point.
A temperature of 35 degrees having the highest peak along with the maximum of enzyme activity makes it the higher for the rate of reaction to be followed up.
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Answer:
B
Explanation:
What is the cell component that does most of the work of the cell working as tools, machines or structures
Answer:
Mitochondria.
Explanation:
Mitochondria is a cell organelle which also known as power house of the cell. It works like a machine because it produces energy when fuel is provided in the form of glucose. In machines, fossil fuels are provided in order to generate energy while Mitochondria work same as the machine, it produces energy in the form of ATP when glucose is provided and this energy is used in various activities by the cell.