Answer:
DNA and RNA are the molucules
Explanation:
How many grams of solute are needed to make 250 mL of a 2.055 M NaCl solution?
30 grams
76.7 grams
300.081 grams
58.44 grams
Answer:
30grams
Explanation:
To calculate the mass (number of grams of the solute) in the solution, we need to calculate the number of moles it contains first. We use the formula;
M = n÷ V
Where; M= Molarity or Molar concentration = 2.055M
n= number of moles= ?
V= Volume = 250mL
Volume in L is 250/1000 = 0.250L
n= M × V
n= 2.055 × 0.250
n= 0.51375moles
The mass is calculated using :
Mole (n) = mass (m) / molar mass (MM)
Molar mass of NaCl = 23 + 35.5
= 58.5g/mol
Mass = molar mass × mole
Mass = 58.5 × 0.51375
Mass = 30.0543
Therefore, the mass is 30grams
Members of a population interact with other populations
in a community, and compete to obtain the matter and
energy they need for basic resources, mates, and territory.
O True
O
False
Answer:
0000
Explanation:
How could these objects be classified: steak knife, screw, and saw blade? A. Objects made of metal B. Objects used for cutting C. Objects used to sew clothing D. Objects with handles
Answer: A.
Explanation: They are all made of metal
What are the three categories of protists, and by which characteristics are they classified?
Answer:
Animal-like protists, Plant-like protists, and Fungi-like protists.
Organism's mode of reproduction, method of nutrition, and motility.
Fun Fact - Mushrooms and other fungi release an incredible amount of spores into the atmosphere every year, and contributing up to 50 million tonnes of particulates.
A conveyer belt moves a 40 kg box at a velocity of 2 m/s. What is the kinetic energy of the box while it is on the conveyor belt?
Which of the following are
factors in weathering and
erosion?
1. Precipitation
2. Temperature
3. Gravity
4. Wind
5. Deforestation
6. Acid
Answer:
please mark brainliest!
Explanation:
- Physical Weathering.
- Chemical Weathering.
- Water Erosion.
- Wind Erosion.
- Gravity.
Answer:
5. deforestation
4. wind
3. gravity
1. precipitation
Which statements are true of a scientific theory but not a hypothesis? It is supported by multiple experiments. It has a strong predictive quality. It is a more general explanation for how or why certain phenomena occur. It is a tentative explanation. It is a falsifiable statement.
Answer: it is supported by multiple experiments
It has a strong predictive quality
It is a more general explanation for how or why certain phenomena occur
Explanation:
What is the internal and external adaptation in a leaf for photosynthesis? Please give a clear short answer (prefer in bullet points). I will give brainliest to fastest answer
Answer:
They are adapted for photosynthesis by having a large surface area, and contain openings, called stomata to allow carbon dioxide into the leaf and oxygen out. ... The cells inside the leaf have water on their surface. Some of this water evaporates, and the water vapour can then escape from inside the leaf.
Answer:
▪︎leaf with large surface area
▪︎dark coloured leaf for maximum sunlight absorbtion
▪︎has stomata openings to allow carbon dioxide diffuse in the leaf
▪︎It has the green pigment :chloroplast inside to absorb sunlight
Interior layer of the Sun where hot and cooler gases circulate. A:convective zone B:chromosphere C:radiative zone D:corona
4. Adaptive radiator
different habitats and few competitors, thus diversifying rapidly into several new
O True
O False
5.
increases the frequency of adaptive mutations in a population over time.
(select only one answer)
O Fitness
O Natural selection
Artificial selection
Adaptive radiation
6. Any change in allele frequencies in a gene pool is called
2
(select only one answer)
natural selection
Answer:
The correct answer is-
4. true
5. Natural selection
6. microevolution
Explanation:
Adaptive radiation is a cycle where living beings diversifying rapidly from a familial or an ancestral species into a huge number of several new types, especially when there are new environmental aspects present such as different habitats and few competitors.
Thus, it is a true statement.
Natural selection is the cycle through which a population or a species of living beings adjust and change over the period of time. natural selection just acts upon the heritable attributes of a population by choosing for advantageous alleles or and in this manner increasing the frequency of these adaptive alleles in the population.
Thus the option Natural selection is correct.
Changes inside a genetic pool from happening to one generation to another is known as microevolution. Allele frequencies in a population may change because of, natural selection, mutation, genetic drift, and genetic flow.
Thus, the correct answer is - microevolution.
How can there be so many similarities between organisms, but also so many different types of plants, animals,
and microorganisms?
Answer:
Many of the similarities between organisms are the result of inheritance: organisms inherit features from their ancestors which they often use in similar ways. ... Other similarities occur because organisms at all places and times face similar problems: finding mates, avoiding predators, obtaining food.
Explanation:
Answer:
not all organisams are diffrent,just know that.
Explanation:although there might be diffrent speices they can still be in like the same organizam
How do experiments show cause-and-effect relationships?
Answer:
A cause and effect relationship is when something happens that makes something else happen. ... Cause and effect relationships are also found in stories. For example, if Mae is late to school, she might lose recess time. In that case, being late to school is the cause and the effect, or result, is her losing recess time.
which of the following is the best explanation of how one organelle and a cell directly supports the work of another organelle to maintain cellular homeostasis
Answer:
All organelles have specific things that they are responsible for, all organelles work together to support the cell to work which maintains homeostasis. Organelles know their jobs and do them right so that the cell can function properly.
7. If a growing child has deficient production of pituitary secretions, this child would
a. Develop acromegaly
b. Become a dwarf
C. Mature sexually at an early age
d. Be in constant danger of becoming dehydrated
Answer:
b. Become a dwarf
Explanation:
A decreased secretion of growth hormone can result in pituitary dwarfism which then decreases the rate of cell division of cartilage cells in the epiphyseal plate
in summer, what happens to the hurricane’s temperature, category, and speed as it travels across a body of water and then land?
I think it starts to get slower as soon as it starts traveling because then hurricanes wouldnt be as bad and would be long, and it could possible get worse as it travels across the water because it could be sucking up water so then it would get bigger and worse. The tempertaure will get colder because it will then start to pour and cause destruction and make it windy and very chilly.
In summer the temperature of hurricane will get colder because it will then start to pour and cause destruction and make it windy and very chilly and it could be sucking up water so then it would get bigger and worse.
What is hurricane?Hurricane has been defined as the conditions which has been expected in a specified area. As defined by National Oceanic and Atmospheric Administration (NOAA), it means that hurricane conditions (sustained winds of 74 mph or greater) are possible within your area and hurricane warnings means hurricane conditions are expected in an area.
The warm ocean water allows more water to get evaporate and this gives more power for the Hurricane to began. Powerful winds clash as a result of the air to move towards upwards which has light wind around the area allows it to start moving round and round with this whole process continues to make the Hurricane powerful and faster.
Therefore, In summer the temperature of hurricane will get colder because it will then start to pour and cause destruction and make it windy and very chilly and it could be sucking up water so then it would get bigger and worse.
Learn more about hurricane on:
https://brainly.com/question/2835662
#SPJ2
what plays a key role in stimulating appetite and enabling us to taste food
Answer:
taste bud is the one that stimulate appetite and enable us to taste
Explanation:
because without the taste bud, we won't know that a particular food contain ions, acids and base
What is a secondary crime scene?
Answer:hope this helps
SECONDARY CRIME SCENES. A location related to the crime but not where the actual crime took place. Sometimes this is the only scene that investigator's know about. There can be MANY secondary crime scenes.
Explanation:
How is the structure of a unicellular organism different than the structure of a multicellular organisms? How does this affect function
Carbon has 6 protons and 6 neutrons for an atomic mass of 12. But there are a some carbon atoms have 8
neutrons (instead of 6). These carbon atoms have a mass of 14 (instead of 12).
What term refers to the fact that in any type of atom some of those atoms have different numbers of neutrons?
Select one:
a. ions
O b. isotopes
O c. neutrons
Answer:
isotopes
Isoyopes are element having same atomic number but different atomic mass
A science class investigated the relationship between the amount of time
students spend doing chores every night and their average grades on
schoolwork. Which statement from the lab report best represents a
conclusion?
A. Based on our results, students who do 1 hour of chores per night
have grades that are on average 0.2 points higher than students
who do no chores.
B. Doing chores at night actually helps students do better at school,
even if it seems like the opposite would be true.
C. We believe that students should spend at least 2 hours doing
chores every night if they want to get better grades at school and
help their families.
OD. If students spend at least 1 hour per night on chores, then they are
guaranteed to get higher grades on their schoolwork.
Answer:
A. Based on our results, students who do 1 hour of chores per night
have grades that are on average 0.2 points higher than students
who do no chores.
Explanation:
In a scientific experiment that employs the scientific method, series of steps should be followed. The steps involved in the scientific method include; making an observation/asking a question, formulating a hypothesis, testing the hypothesis, analyzing the result, drawing a conclusion etc.
From this step, we would notice that DRAWING CONCLUSION immediately follows the analysis of result, which means the conclusion is based on the result of the experiment. A conclusion in a scientific experiment should be factual and based on the measured result. It should either reject or accept the hypothesis.
The best representation of a conclusion is A. Based on our results, students who do 1 hour of chores per night have grades that are on average 0.2 points higher than students who do no chores. This statement has a conclusive content unlike other options that still seemed unlikely.
Answer:
A
Explanation:
Did the quiz
. As the volume of the cell increases, how does the surface area to volume ratio (SA/Ve) change?
Answer: Well, you see, As the cube size increases or the cell gets bigger, then the surface area to volume ratio - SA:V ratio decreases. ... When a cell grows, its volume increases at a greater rate than its surface area, therefore it's SA: V ratio decreases.
Explanation:
I would like to know your opinion:
Suppose that you and your spouse held frozen embryos at a private fertility clinic and that you knew you would never need them. Would you donate them for stem cell research? Why or why not?
explain when you would use a line graph
which of these are claims of pseudoscience most likely based on?
A. Critical Thinking
B. Logical Reasoning
C. Controlled Experiments
D. Creative Imagination
Answer: I think the answer is creative imagination
Explanation:
The definition of pseudoscience is:
a collection of beliefs or practices mistakenly regarded as being based on scientific method.
Here is something I found online
A pseudoscience is a fake science that makes claims based on faulty or nonexistent scientific evidence. In most cases, these pseudoscience present claims in a way that makes them seem possible, but with little or no empirical support for these claims. Graphology, numerology, and astrology, are all examples of pseudoscience.
A scientist is observing a eukarotic cell and a prokaryotic cell. Which structure could she only observe in the eukaryotic cell? cytoplasm DNA ribosomes a nucleus
Answer:
D. a nucleus
Explanation:
What is the role of the biomolecule represented in this diagram?
Answer:
provides energy and insulation
Explanation:
the biomolecule is carbohydrates or lipids
The list shows the results of six athletes competing in the long jump, which has a target distance of 20 feet. 12 feet, 11 feet, 13 feet, 10 feet, 20 feet, 12 feet Which best describes the results? a. fairly accurate but not precise b. fairly precise but not accurate c. not precise and not accurate d. fairly precise and fairly accurate
Answer:
B
Explanation:
Answer:
b
Explanation:
Worksheet 5 Cell Division for students answerkey from umuc
Answer:
binary fission,meiosis and
mitosis,
PLEASE HELP MEH!!!!
A patient’s blood is tested for growth hormone which has a molecular mass of 848.952 g/mol. The test results show a normal concentration of 4 . 0 × 10 − 6 g/L. How many moles of growth hormone are in 1 L of blood?
Is DNP and cyanide an inhibitor of cellular respiration?
Answer: Yes.
Explanation:
DNP and cyanide are both cellular respiration inhibitor.
Cyanide is a neurotoxin that can prevent cellular respiration by it's inactivation activity on mitochondria enzymes called cytochrome oxidase.
DNP (2,4-Dinitrophenol is a chemical that inhibit cellular respiration. It help to shuttle proton across cell membranes of living cells by spreading the proton along along the mitochondria and collapsing the force that produced energy for the cell activities.