Robert Hooke was the first person to observe cells. He observed these cells in
(a) a piece of cork.
(b) a slice of honeycomb.
(c) human blood.
(d) plaque from his own teeth.
Robert Hooke was the first person to observe cells. He observed these cells in (a) a piece of cork.
I hope this helps!
Robert Hooke was the first person to observe cells. He observed these cells in a piece of cork. Thus, option A is correct.
What is cell cycle?
Cell cycle is defined as cycle in which cell produces, grows and divides. The cell cycle has mainly three steps the first one is G1 phase in which the size of cell increases, S phase synthesis of DNA takes place and the third step is G2 phase in which cell ready to divide.
Cell is defined as the base of life as it is the structural as well as functional unit of life. Cell is made up of pre existing cells and the cell contain various cell organelles such as mitochondria, endoplasmic reticulum, ribosomes, golgi appratus, nucleus, and cytoplasm.
Basically, cell is of two type one in prokaryotic and another one is eukaryotic. The prokaryotic cell is known as pre mature cells as they do not contain cell organelles and eukaryotic cell are known as advanced and developed cells as they contain several cell organelles.
Therefore, Robert Hooke was the first person to observe cells. He observed these cells in a piece of cork. Thus, option A is correct.
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The main characteristic of the architecture of all plant-pollinator networks on Earth is ________.
Answer:
The main characteristic of plant-pollination networks is their nested designs.
Which types of species tend to dominate river ecosystems.
Answer:
fish species
Explanation:
How are the nitrogen and carbon cycles similar? What makes the phosphorous cycle different?
-Both carbon and nitrogen involve getting the element out of the biosphere into the atmosphere. Phosphorous is found in the atmosphere.
-Both carbon and nitrogen involve putting the element into the biosphere and atmosphere. Phosphorous is not found in the atmosphere.
-Both carbon and nitrogen involve putting the element into the biosphere and atmosphere. Phosphorous is found in the atmosphere.
-Both carbon and nitrogen involve getting the element out of the atmosphere into the biosphere. Phosphorous is not found in the atmosphere.
Answer: that carbon cycles through the atmosphere whereas phosphorus does not
Explanation:
Which process provides humans with the glucose needed for cellular respiration?
Answer:
Glycolysis
Explanation:
Your body uses cellular respiration to convert glucose to ATP and carbon dioxide using oxygen. Glucose moves through three stages in cellular respiration, glycolysis where glucose is converted to pyruvate, and two ATP and NADH are made
Compare 41 Calories to 410 kcal (1 kcal = 1,000 calories). (1 point)
O 41 Calories is greater than 410 kcal
O 41 Calories is equal to 410 kcal
41 Calories is less than 410 kcal
It is not possible to compare these two values
From the calculation, we can deduce that 41 Calories is less than 410 kcal.
Given the following data:
Energy in calories = 41 CaloriesEnergy in kcal = 410 kcalTo compare 41 Calories to 410 kcal, we would simply convert the given values to the same base values:
Hence, we would make Calories the base value by converting the value in kcal to Calories as follows:
Conversion:
1000 Calories = 1 kcal
41 Calories = X kcal
Cross-multiplying, we have:
[tex]1000X =41\\\\X=\frac{41}{1000}[/tex]
X = 0.041 kcal.
From the calculation, we can deduce that 41 Calories is less than 410 kcal.
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Answer: 41 Calories is less than 410 kcal
Explanation: I took the test and passed
what is the general purpose of the light reactions of photosynthesis
Answer:
The overall purpose of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy will be used by the Calvin cycle to fuel the assembly of sugar molecules.
Explanation:
Sana tama hshshshshsh
Uy may nag abroad ah
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12. Which is NOT a natural cause of extinction?
A. Disease
B. Catastrophic events
C. Introduction of new species
D. Competition due to overpopulation
24. Which is NOT true about energy transformation?
A. Energy is essential to all organisms.
B. Food contains energy that is needed by all organism.
C. Heterotrophs feed on autotrophs and other heterotrophs to gain energy.
D. Autotrophs do not need energy because they can produce their own food.
23. Which is the CORRECT sequence of events in cellular respiration?
A. Glycolysis - fermentation - Krebs Cycle
B. Glycolysis - Krebs Cycle - Electron Transport
C. Krebs Cycle - Electron Transport - Glycolysis
D. Krebs Cycle - Glycolysis - Electron Transport
2. In humans there are four types of blood; type A, type B, type AB and type O. A person with a genotype of IaIa or Iai will have blood type_____?
A. A
B. B
C. O
D. AB
4. A couple has four children, one son and three daughters. What is the chance that the fifth child will be a daughter?
A. ¼
B. ½
C. ¾
D. 1/5
22. Cellular respiration releases energy by breaking down_______.
A. ATP
B. water
C. carbon dioxide
D. food molecules
5. A man is colorblind but there is no history of this disorder in his wife’s family. What is the chance that their son is color
blind?
A. 0
B. 25%
C. 75%
D. 100%
25. Which BEST summarizes the process of respiration?
A. Water + Carbon Dioxide ( light) sugar + oxygen
B. Sugar + Oxygen (enzymes) water+ carbon dioxide +energy
C. Water + Sugar ( light ) carbon dioxide + oxygen
D. Oxygen + Water (enzymes) sugar + carbon dioxide + energy
1. A father with blood type AB and a mother with blood type O will probably produce offspring with a blood type ___. *
A. A
B. B
C. A or B
D.AB or O
6. What is a sex- linked trait that results in the inability to have normal blood clotting?
A. baldness
B. color blindness
C. diabetes
D. hemophilia
11. What causes species extinction?
A. Pollution and reforestation
B. Reforestation and carbon emission
C. climate change and over consumption
D. conservation and consume
18. The pigment molecules responsible for photosynthesis are located in the _______? *
A. Mitochondria
B. Cytoplasm of the cell
C. Stroma of the chloroplasts
D. Thylakoid membrane of the chloroplasts
13. Which part of a leaf contains most of the chloroplasts?
A. Lower epidermis
B. Palisade mesophyll
C. Spongy mesophyll
D. Upper epidermis
19. At optimum light intensity, which atmospheric gas most directly influences the rate of photosynthesis?
A. Nitrogen
B. Oxygen
C. Sulfur
D. Carbon Dioxide
14. What part of the leaf is this tiny opening in the lower epidermis which makes it rough and responsible for the entrance and exit of gases in plants?
A. xylem
B. phloem
C. stomata
D. guard cells
16. In which part of the chloroplast does light reactions of photosynthesis takes place?
A. Grana
B. Stroma
C. Inner membrane
D. Outer membrane
17. Which is NOT needed to make food in plants?
A. Flower
B. Sunlight
C. Chlorophyll
D. Carbon Dioxid
8. Color-blindness is inherited as a sex-linked recessive trait. If a normal woman, carrier of the gene marries a man with normal color vision. What would be the expected phenotype of their children with reference to color-blindness?
A. All color-blind
B. 2 carriers, 2 color-blind
C. 1 normal, 3 carriers
D. 2 normal, 1 carrier, 1 color-blind
3. Blood type O has both antibodies A and antibodies B in the plasma but has no antigen on its erythrocytes or red blood cells. That is why Blood Type O is considered UNIVERSAL______.
A. Blood
B. Donor
C. Marker
D. Recipient
7. Melvin’s thinning hair is like that of his father. This characteristic of baldness is due to
A. multiple alleles
B. sex-linked
C. sex-influenced
D. sex-limited
Answer:
12.B
17. A
11. C
13. B
16. A
7. B
8. B
19. D
23. B
give 3 examples or where potential energy was convertedto kilinetic energy
Answer:
give 3 examples or where potential energy was convertedto kilinetic energy.
1. Pink flowers are produced from crossing a flower with a red gene and a flower with a white gene. What
a
type of inheritance would that indicate?
a.
Co-dominance
b. Incomplete
c. Mendelian
d. Dominant
Answer:
Incomplete dominance
Explanation:
no allelic gene is dominant over the other..ie no gene masks thee other
Describe a bacteria cell and what makes it different from eukaryotic cells?
Answer:
Bacteria is like eukaryotic cells they have cytoplasm, ribosomes, and a plasma membrane. Features that make a bacterial cell different from a eukaryotic cell the circular DNA of the nucleoid, the lack of membrane bound organelles, the cell wall of peptidoglycan, and flagella.
Explanation:
A scientist performs a series of mutation screens to look for mutations that reduce ATP production. One of the mutants, compared to a wild-type cell, has reduced levels of ATP and NADH and increased levels of FAD and pyruvate. Which hypothesis best fits these observations?
The hypothesis that best fits the observation that one of the mutants has reduced levels of ATP and NADH and increased levels of FAD and pyruvate is that the mutation is disrupting the citric acid cycle (Option 3).
What is the citric acid cycle?The citric acid cycle, also known as the Krebs cycle, is the second step of cellular respiration which is required to generate ATP through the oxidation of pyruvate.
The reduced form of Nicotinamide adenine dinucleotide (NADH) produced during the citric acid cycle is then used in oxidative phosphorylation (the third step of cellular respiration) in order to generate more ATP.
Therefore, with this data, we can see that the citric acid cycle generates the reduced form of Nicotinamide adenine dinucleotide (NADH) and thus increases the production of ATP, thereby a mutation in an enzyme that works in this pathway may also hamper the proportion of ATP.
Complete question:
A scientist performs a series of mutation screens to look for mutations that reduce ATP production. One of the mutants, compared to a wild-type cell, has reduced levels of ATP and NADH and increased levels of FAD and pyruvate. Which hypothesis best fits these observations?
The mutation is disrupting glycolysis.
The mutation is disrupting fermentation.
The mutation is disrupting the citric acid cycle.
The mutation is disrupting the electron transport chain.
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Answer:
For the people to lazy to read that. The answer is c.
Explanation:
1:Can all genetic mutations be observed with a karyotype? Explain:
2:Evaluate the use of karyotyping in genetic testing to determine the health of an unborn baby.
Explanation:
Karyotyping is a test to examine chromosomes in a sample of cells. This test can help identify genetic problems as the cause of a disorder or disease.
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Mr. Fuad and Mr. Razak live as neighbours in a village near the sea. Mr. Fuad is a fisherman while Mr. Razak teaches at a school in the village.
Photograph 1 shows a set of breakfast for a healthy a man.
Boiled egg Sandwich Tea Watermelon
(a) Study the set of food. State whether the set is more suitable for Mr. Fuad or Mr. Razak. Justify your answer.
b) Suggest a breakfast set that is suitable for the individual that you did not choose in 6(a).
a) The set of breakfast having Boiled egg Sandwich Tea Watermelon is more suitable for Mr. Razak.
On a toasted bagel or English muffin, a fried egg, ham, and cheese make up a traditional egg sandwich. The presence of eggs may persuade consumers that this dish is a lean, protein-rich option for breakfast.Mr. Razak needs energy in the morning to kickstart his day. Eggs have a lengthy list of health advantages and are a rich source of protein, vitamins, calcium, etc. From promoting weight loss to increasing the body's levels of "good" cholesterol.b) Mr. Faud will need a heavier breakfast because he has to perform physical tasks all day which requires more energy. hence he should include 2 boiled eggs, yogurt, porridge, fruits and juice in his meal.
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a _________ is an example of an endotherm, and a ________ is an example of an ectotherm.
Answer: People, polar bears, penguins, and prairie dogs, like most other birds and mammals, are endotherms. Iguanas and rattlesnakes, like most other reptiles—along with most fishes, amphibians, and invertebrates—are ectotherms.
green plants use _______ and ________ as raw materials for photosynthesis
Answer:
Water and carbon dioxide.
Explanation:
Explain what must happen before a cell can divide
Answer:
the cell must go through mitosis and chromosomes in the nucleus must double
Blood vessel diameter fluctuates between being constricted and being dilated. This is the primary contributor to blood pressure. In order for blood vessels (arterioles) to maintain a steady pressure, there must be a prolonged presence of what ion in the smooth muscle cell's cytosol
In order for blood vessels to maintain a steady pressure, there must be a prolonged presence of CALCIUM ions in the smooth muscle cell's cytosol. This ion initiates smooth muscle contraction.
Arterioles are blood vessels that have muscular walls consisting of one or two layers of smooth muscle cells.
Calcium (Ca2+) ions start the contraction of the smooth muscle cells by binding to calmodulin protein and thereby activating myosin.
In consequence, Ca2+ ions act as a secondary messenger that activates calmodulin, stimulating the phosphorylation of the myosin light chain and thus triggering muscle contraction.
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Do viruses consume energy in order to live.
Answer:
Viruses are too small and simple to collect or use their energy – they just steal it from the cells they infect. Viruses only need energy when they make copies of themselves, and they don't need any energy at all when they are outside of a cell.
Explanation:
Answer:
yes and no
Explanation:
Viruses only need energy when they make copies of themselves, and they don't need any energy at all when they are outside of a cell.
What substances in food provide organisms with energy?
Answer:
A food is something that provides nutrients. Nutrients are substances that provide: energy for activity, growth, and all functions of the body such as breathing, digesting food, and keeping warm; materials for the growth and repair of the body, and for keeping the immune system healthy.
Explanation:
Answer: Carbohydrates
Explanation: Because of the starches and sugars in food, that gives your body‘s main sources of energy.
Homeostasis is an organism's ability to _______. a. obtain energy from food b. interact with its specific environment c. maintain a constant internal environment d. survive without water for long periods of time
Answer:
C. Maintain a constant internal environment
Explanation:
Homeostasis is keeping an internal environment stable.
What happens during metaphase 2 in meiosis?
Answer:
During metaphase II, the centromeres of the paired chromatids align along the equatorial plate in both cells. Then in anaphase II, the chromosomes separate at the centromeres. The spindle fibers pull the separated chromosomes toward each pole of the cell.
Help with questions in image
Answer:
A) bird
B) snake
C) grass
D) cricket
E) should be snake
im sorry i dont know what F is
Explanation:
How did mendel prove the law of segregation.
how much atp is gained at the end of cellular respiration
specific enteroendocrine cells of the stomach, called g cells, are stimulated by partially digested proteins, caffeine, and rising ph. when stimulated, g cells secrete ________.
when stimulated, g cells secrets oocytes
although a fetus is relatively protected in the mothers womb a number of different toxins can harm the fetus
What are the two types of reactions enzymes facilitate?
Your body's 2nd choice of food group to break down for energy?
Answer:
protein
Explanation:
because it has many functions andreplaces most nutrients
4. Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted a t a speed of 2 m/sec. The other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec.
Question a. Which object had more kinetic energy while it was being lifted?
Question b. Which object had more potential energy when it was lifted to a distance of 10 meters? Show your calculation.
Explanation:
a) Case1, by the formula, ke=½mv².
m=2kg, v=2m/s
ke = ½×2×2² = 4J
Case2, by the formula, ke=½mv².
m=4kg, v=3m/s
ke = ½×4×3² = 18J
therefore, the second object has more kinetic energy.
b) Case1, by the formula, pe = mgh
m=2kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe1(write 1 in subscript) = 2×9.8×10= 196J.
Case2, by the formula, pe = mgh
m=4kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe2(write 2 in subscript) = 4×9.8×10= 392J.
so, the object 2 has more potential energy.
hope this helps you.
