Robert Hooke was the first person to observe cells. He observed these cells in (a) a piece of cork.
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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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Pesticides may enter a forest ecosystem in a number of different ways. Sometimes,
humans intentionally introduce a chemical pesticide to a forest to control the spread of an
invasive species. Although a pesticide may be designed to destroy this species and benefit
the ecosystem, using it can sometimes have unintended consequences.
Which sentences describe possible negative, unintended consequences of this practice?
Select all the correct answers.
The pesticide may be absorbed by other plants and harm them.
Animals that consume plants may ingest the pesticide and be harmed by it.
The pesticide may rid the ecosystem of the species it is designed to destroy.
The pesticide may enter the soil and be washed to other locations by moving water.
Answer:
The pesticide may be absorbed by other plants and harm them;Animals that consume plants may ingest the pesticide and be harmed by it.;The pesticide may rid the ecosystem of the species it is designed to destroy.
Explanation:
I feel these are the most negative consequences they could have
BRAINLIEST?
Which of the following is a healthy weight loss strategy?
Answer:
b. Make each of your meals last 20 minutes.
Explanation: is correct answer
What are differences between the structures ofDNA and RNA?
Sources:
The Differences Between DNA and RNA - ThoughtcoDifference Between DNA and RNA - ByjusWhen mRNAs are being translated simultaneously by multiple ribosomes, the structure is known as a(n) polytene. polyribosome. polycistron. operon. copolymer.
Answer:
polysomes or polycistron
Explanation:
when multiple ribosome attach to single mRNA
7)When a body cell divides through the process of mitosis, the chromosomes in the daughter cells *
are formed when chromosomes from the parent cell cross over.
are identical to the chromosomes of the parent cell.
represent only the healthiest chromosomes from the parent cell.
represent only half of the chromosomes in the parent cell.
8)Before a cell enters mitosis, what happens to the genetic information in that cell? *
The information is duplicated.
The information is selectively mutated.
The information is halved.
The information is completely changed.
9)Which of the following best describes how mitosis is related to cellular reproduction? *
Mitosis is a phase in asexual reproduction that results in the formation of similar, but not identical, nuclei in the daughter cells.
Mitosis is a phase in asexual reproduction that results in the formation of identical nuclei in the daughter cells.
Mitosis is a phase in sexual reproduction that results in the formation of similar, but not identical, nuclei in the daughter cells.
Mitosis is a phase in sexual reproduction that results in the formation of identical nuclei in the daughter cells.
10)Which of the following occurs during the interphase stage of the cell cycle? I. DNA is replicated. II. The cell divides. III. The cell grows in size. *
II only
I and III only
I, II, and III
I and II only
11)A diagram of the cell cycle is shown below. Which of the following statements best describes what happens during the S phase of the cell cycle? *
The cell's chromosomes separate.
The contents of the cell divide.
The cell's DNA is replicated.
The cell prepares for mitosis.
12)At a point during a cell's development, it begins to differentiate. How does differentiation occur? *
Certain genes are turned on and others are turned off; this action produces adult cells that are specialized
As a cell matures, genes that are not necessary to its function are ejected out of the cell through active transport.
The number of chromosomes in the cell is reduced by half; this action triggers the specialization of the cell.
A developing cell's function is determined by the number of organelles that are contained in the cell.
Answer:
are identical to the chromosomes of the parent cell
Explanation:
ilang hati ang gagawin mo sa pizza? bakit?
Answer:
I will make 8 slices....
because I do love it....
it depends on you and ur choice how many pieces of what type of shape you want to have...
Which statement best represents the way the köppen climate system, environmental determinism, and possibilism are related?.
The ____________ receives the filtrate from the DCTs of several nephrons and funnels it toward the ____________ .
Answer:
collecting duct, renal pyramid
Explanation:
The collecting duct receives the filtrate from the DCTs of several nephrons and funnels it toward the renal pyramid.
Name some organisms that are producers
First of all, we must understand what we are looking for. We know that producers are basically organisms which make their own food. Therefor some examples are:
1) Algae (creates its own food using energy from the sun)
2) Plants (creates its own food using energy from the sun)
3) Phytoplankton
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describe the path that oxygen travels when you breathe.
Answer:
The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell. When oxygen passes into the bloodstream, carbon dioxide leaves it.
Explanation:
what species do we consider good and which ones are bad
Answer:
We may consider bees good because they pollinate the plants that give us food crops. We may consider mosquitos bad because they can transmit malaria.
IQ is determined by:(1 point)
multiple genes only
both a single gene and environmental factors
a single gene only
multiple genes and environmental factors
IQ is determined by ; ( D ) multiple genes and environmental factors
IQ ( intelligence quotient ) is influenced by more than a single gene ( i.e. multiple genes ) and this makes IQ a polygenic trait found in organisms such as humans.
IQ is not only determined by multiple traits but is strongly influenced by environmental factors just like the multiple genes. IQ measures the intellectual ability of humans ( i.e ability to read and think critically outside the box and also think logically . )
Hence we can conclude that IQ is determined by multiple genes and environmental factors
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Answer:
multiple genes and environmental factors
Explanation:
What is cellular respiration and how does it work
Explanation:
cellular respiration, the process by which organisms combine oxygen with foodstuff molecules
Many fishes and other organisms that live in the deep ocean produce light. What are two ways in which this light might be useful?
Answer:
Explanation:
Bioluminescence is used by living things to hunt prey, defend against predators, find mates, and execute other vital activities. Some species luminesce to confuse attackers. Many species of squid, for instance, flash to startle predators, such as fish.
What could happen if the brain stem were damage
ANSWER:
A brain stem injury can cause DIZZINESS or LACK OF MOTOR FUNCTION,with more severe cases resulting in PARALYSIS,COMA,or DEATH.Treatment can be extremely expensive and many victims are unable to work while coping with a brain stem injury.
When does osteogenesis begin?
Answer:
a. When a fetus is 13-15 weeks old
Explanation: is correct
Two women gave birth to girls in the same hospital at the same time. The nurses think they may have accidentally switched the babies' name tags and given the babies to the wrong parents. One baby, Jane, is type O blood. The other baby, Mary, it type A blood. The father in the first set of parents, the Reds, is blood type A and the mother is blood type B.The father in the second set of parents, the Greens, is blood type AB and the mother is blood type O.Which baby belongs to the Reds?
Answer:
Jane belongs to the greens
Mary belongs to the Reds
Mary belongs to Greens, whereas Jane belongs to Reds (it is due to the allele in the parents).
What is the ABO blood system?The blood system is an allele system that determines the presence of antigens in the red blood cells.
In the ABO blood system, the A and B alleles are codominant, whereas the O allele is recessive and masked by A and B.Mary is type A blood, whereas Jane is type O blood which can be due to the following allele combinations:Reds
A O
B AB OB
O OA OO
Greens
A B
O AO OB
O AO OB
In conclusion, Mary belongs to Greens, whereas Jane belongs to Reds (it is due to the allele in the parents).
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To observe the surface of an ant you would use...
a dissecting microscope
a scanning electron microscope
a transmission electron microscope
a compound light microscope
Use the
Color-Enhanced TEM Magnification: 15,000 x
6. The photomicrograph shows which kind of cell?
A. prokaryotic cell C. animal cell
B. eukaryotic cell D. plant cell
A. Prokaryotic Cell.
..............
Match each part of the brain with the correct label. 2
Answer:
For the numbers on the brain
1. Forebrain: Telencephalon
2. Forebrain: Diencephalon
3. Hindbrain
4. Midbrain
Explanation: correct
How to read a pedigree.
Answer:
Explanation:
One trick for identifying a recessive trait is that if a trait skips a generation in a pedigree, it is often an autosomal recessive trait (although a trait can be autosomal recessive and not skip generations). These traits appear with equal frequency in both sexes.
the process of ending a conflict through cooperation and compromise is called
Answer:
the process of ending a conflict through cooperation and compromise is called. conflict resolution. the use of communication and, in many cases, compromise to settle a disagreement is known as. negotiation.
Explanation:
Mrs. W. is 68 years old and lives alone. She moves very slowly and does not respond verbally to what others say. She sometimes mumbles to herself. Her face is expressionless. She seems confused by her surroundings. She is accompanied by her daughter, who is highly observant and an accurate reporter of Mrs. W.’s past medical and psychosocial history. What possible Noncognitive Disorders could Mrs. W have?
The non-cognitive disturbances that Mrs. W. could have related to some dementia are psychosis, personality change, lack of rhythm, deficit in emotional responses, mental confusion.
It is important that the patient in these conditions is continuously assisted, to avoid situations that put her safety at risk.
An elderly woman like Mrs. W, who already has significant evolution of non-cognitive disorders, must have an effective medical apparatus and a tutor willing to help with care and daily activities.
Ideally, caregivers should develop optimal communication skills for patients with these disorders, such as a calm and gentle tone, provide the individual with a peaceful environment without too much noise or other disturbances, as well as being considerate and not neglecting the individual's needs.
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scients is a combination of three things what are they?
Answer:
Modern Science is mainly constituted of three main branches, i.e. Natural Sciences, Social Sciences, and Formal Sciences as these three areas peruse upon the nature of our world and the universe in the broadest way. Thus, the three main branches of Science are: Natural Sciences. Social Sciences, and formal
why is it important photosynthetic organisms to have access to water
Answer:
Plants also need water for photosynthesis. Photosynthesis is what plants do to create their food, and water is critical to this process. ... The water from the leaves evaporates through the stomata, and carbon dioxide enters the stomata, taking the water's place. Plants need this carbon dioxide to make food.
The different forms matter can take are referred to as states or countries.
Answer:
Three States of Matter
Learning Objective
Describe the three states of matter
Key Points
Matter can exist in one of three main states: solid, liquid, or gas
The states of matterThis diagram shows the nomenclature for the different phase transitions.
Solids
A solid’s particles are packed closely together. The forces between the particles are strong enough that the particles cannot move freely; they can only vibrate. As a result, a solid has a stable, definite shape and a definite volume. Solids can only change shape under force, as when broken or cut.
In crystalline solids, particles are packed in a regularly ordered, repeating pattern. There are many different crystal structures, and the same substance can have more than one structure. For example, iron has a body-centered cubic structure at temperatures below 912 °C and a face-centered cubic structure between 912 and 1394 °C. Ice has fifteen known crystal structures, each of which exists at a different temperature and pressure.
A solid can transform into a liquid through melting, and a liquid can transform into a solid through freezing. A solid can also change directly into a gas through a process called sublimation.
Liquids
A liquid is a fluid that conforms to the shape of its container but that retains a nearly constant volume independent of pressure. The volume is definite (does not change) if the temperature and pressure are constant. When a solid is heated above its melting point, it becomes liquid because the pressure is higher than the triple point of the substance. Intermolecular (or interatomic or interionic) forces are still important, but the molecules have enough energy to move around, which makes the structure mobile. This means that a liquid is not definite in shape but rather conforms to the shape of its container. Its volume is usually greater than that of its corresponding solid (water is a well-known exception to this rule). The highest temperature at which a particular liquid can exist is called its critical temperature.
A liquid can be converted to a gas through heating at constant pressure to the substance’s boiling point or through reduction of pressure at constant temperature. This process of a liquid changing to a gas is called evaporation.
Gases
Gas molecules have either very weak bonds or no bonds at all, so they can move freely and quickly. Because of this, not only will a gas conform to the shape of its container, it will also expand to completely fill the container. Gas molecules have enough kinetic energy that the effect of intermolecular forces is small (or zero, for an ideal gas), and they are spaced very far apart from each other; the typical distance between neighboring molecules is much greater than the size of the molecules themselves.
A gas at a temperature below its critical temperature can also be called a vapor. A vapor can be liquefied through compression without cooling. It can also exist in equilibrium with a liquid (or solid), in which case the gas pressure equals the vapor pressure of the liquid (or solid).
A supercritical fluid (SCF) is a gas whose temperature and pressure are greater than the critical temperature and critical pressure. In this state, the distinction between liquid and gas disappears. A supercritical fluid has the physical properties of a gas, but its high density lends it the properties of a solvent in some cases. This can be useful in several applications. For example, supercritical carbon dioxide is used to extract caffeine in the manufacturing of decaffeinated coffee.
Phase Changes –What does a phase change look like at the molecular level? This video takes a look at the molecular structure of solids, liquids, and gases and examines how the kinetic energy of the particles changes. The video also discusses melting, vaporization, condensation, and freezing.
Explanation:pa brainliest answer po
40 points!!!!!!Select the correct answer from each drop-down menu.
Humans use many chemical substances for farming that consequently affect biodiversity. These compounds, which are rich in nitrogen
and phosphorus, are used to fertilize crops. Excessive use of these compounds causes
______ , which leads to
_____ in bodies of water.
Answer:
eutrophication and algal growth
Which of the following is TRUE of compact bone?
Answer:
c. It gives bone its white, smooth appearance.
Explanation: is correct
the middle primary brain vesicle, the mesencephalon, gives rise to which adult brain structure?
transcription begins at a promoter. what is a promoter?
Answer:
A site in DNA that recruits the RNA Polymerase
Explanation:
