Biology High School

Robert Hook discovered cells when viewing a _____ under a microscope.

box
blood
cork
plant

Answers

Answer 1
the answer is two cork

Answer 2

Answer:

Cork

Explanation:

Related Questions

What is the main piece of legislation governing how water quality is regulated in the Everglades? Clean Water Act Dirty Water Act Clean Up Your Act Everglades Water Quality Act Question 11 (Essay Worth 5 points)

Answers

I believe it is the Clean Water Act

Answer:

Option A , Clean water act

Explanation:

The clean water act is the regulatory document that formulate the basic structure of controlling the discharge of waste and pollutant into the water. This act came into being in 1948 and was further amended in 1972. Under this act standards were set for wastewater discharge from industries and surface water.  

Also the discharge of waste into navigable water without prior permission was made unlawful

hence, option A is correct.

The process of removing and fixing orphan records is often called ____.

Answers

Orphan records are records whose foreign key value does not refer to a primary key value. Orphan records are very common in database relationships. The process used to remove and fix orphan records is called scrubbing the database.

The process of removing and fixing orphan records is commonly called Referential Integrity Checking or cleanup. These are records that lack corresponding entries in the related table. Maintaining referential integrity ensures data reliability.

The process of removing and fixing orphan records in a database is often called Referential Integrity Checking or cleanup. Orphan records are those records that don't have corresponding records in the related table. For example, in a library database, a record of a book that doesn't have a matching author record could be considered an 'orphan'. This can occur due to deletion, software failure, or other issues. Data integrity is crucial to maintaining correct and reliable data in a database. The process of referential integrity checking ensures that there are no orphan records.

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Which muscle bends the lower arm toward the upper arm?

Answers

That would be the Flexion

Answer:

the smooth muscle

Explanation:

A bacterium lacking the receptor for responding to quorum-sensing signals would be unable to

Answers

It would unable to create coordination with other microbes. Quorum-sensing is very important in bacterias. It relies on signal secreted by other higher and larger organisms in their environment. It allows them to adapt and coordinate with other microbes, pathogens, and living organism.

The process in which sperm and egg cells join is called ____________________.

Answers

The process is called Fertilization

Final answer:

Fertilization is the process in which egg and sperm cells unite to form a zygote. This is facilitated by acrosomal reactions that allow the fusion of egg and sperm membranes and transfer of the sperm nucleus into the ovum.

Explanation:

The process in which sperm and egg cells join is called fertilization. This involves the fusion of gametes, an egg and a sperm, to form a zygote. In mammals, a layer called the zona pellucida protects the egg. A series of events known as acrosomal reactions take place when a sperm binds to this layer, allowing the sperm plasma membrane to fuse with the egg plasma membrane. Thus, the sperm nucleus is able to transfer into the ovum. The nuclear membranes of the egg and sperm break down, and their two haploid nuclei fuse to form a diploid nucleus or genome.

Fertilization is the fusion of the gametes, a sperm and an egg, to form a zygote. It involves a series of biochemical events, including the acrosomal reactions, which allow the sperm plasma membrane to fuse with the egg plasma membrane and transfer the sperm nucleus into the ovum.

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A client with cancer is being treated on the oncology unit for bilateral breast cancer. the client is undergoing chemotherapy. the nurse notes the client's serum calcium concentration is 12.3 mg/dl (3.08 mmol/l). given this laboratory finding, the nurse should suspect that the

Answers

A serum calcium concentration of this range only means that the cancer must be suspected to be a malignant one. So the nurse should suspect that the malignancy of the cancer is what is causing the electrolyte imbalance of the patient. 

What part of the cell is an organelle that converts glucose energy from foods to usable energy for us?

Answers

Mitochondria converts glucose into energy for us

What might cause a virus in the lysogenic cycle to suddenly enter the lytic cycle?

Answers

stress of host cell, the host cell needs to be weak enough for the virus to make vital orgenells to function

Answer:

The correct answer would be the "stressful conditions of the host cell."

In the lysogenic cycle, the viral genome gets attached and integrated into host cell chromosomes and the virus becomes dormant and is termed as a prophage.

However, environmental stress to the host cell such as exposure to a toxic substance, starvation et cetera may cause the prophage to be excised which then enters the lytic cycle.

Select the correct answer.

What hormonal change occurs after fertilization that causes the endometrial lining to remain intact so that the fertilized egg can successfully implant in it?

A. The pituitary gland secretes oxytocin, which maintains the endometrial lining.

B. The pituitary gland secretes follicle stimulating hormone, which acts on the follicles and stimulates them to produce progesterone.

C. The hypothalamus secretes gonadotropin releasing hormone, which maintains the endometrial lining.

D. The developing embryo secretes human chorionic gonadotropin, which prevents the corpus luteum from disintegrating.

E. The developing embryo takes over the production of progesterone after the breakdown of the corpus luteum to maintain the endometrial lining.

Answers

The correct option is B.
For a mature woman, each month the increased level of estrogen hormone leads the pituitary gland to secrete luteinizing hormone. Once this hormone is secreted, the ovary releases a single egg which moves down to the lining of the uterus. If fertilization does not occur, the egg is shed together with the lining of the uterus in a monthly process called mensuration. If fertilization occur, then the fertilized egg attach to the lining of the uterus and placenta is formed. The fertilized egg then send signal to the ovary to keep secreting progesterone, which will sustaining the pregnancy by keeping the uterus lining thick and nourishing for the developing embryo.

Answer:

B. The pituitary gland secretes follicle stimulating hormone, which acts on the follicles and stimulates them to produce progesterone.

Explanation:

Which of the following organelles is found in both plant and animal cells?
a.cell wall
b.chloroplast
c.central vacuole
d. mitochondrium

Answers

mitochondrium is the answer
d. mitochondria
cell walls, chloroplasts and central vacuoles are in plants but not animals

"where does the bond form that binds one strand of dna to its other strand"

Answers

The bonds form between the bases

The city has applied for a government grant to build a new wastewater treatment facility. To qualify for the grant, the city must prove it has accounted for all potential dangers to animal populations surrounding the plant. What environmental parameters should be monitored to ensure the plant is not adversely affecting the animal species living near the plant?

Answers

The environmental parameters that should be monitored to ensure that the plant is not adversely affecting the animal species near the plant are MIGRATING BIRD POPULATION AND THE CARRY CAPACITIES OF THE LOCAL ANIMAL SPECIES. Monitoring these parameters, we allows the city to know if the plant set up is affecting the population of the animals in the area.

The environmental parameters that should be monitored to ensure the plant is not adversely affecting the animal species living near the plant is the gradual migrating of bird populations and the carry capacities of local animal species.

Monitoring of environmental parameters would allows the city to know if the plant set up is affecting the population of the animals in the area.

In conclusion, the monitored parameters would be gradual migrating of bird populations and the carry capacities of local animal species.

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Some materials can move across the cell membrane against a concentration gradient by what

Answers

Osmosis or cellular osmosis is the phenomenon that refers to the transfer of solvent molecules through the semi permeable membrane from a cell with a higher concentration of these molecules to another cell that has a lower concentration of these molecules.

what kind of crystal is halite crystal (rock salt)?

Answers

It is "Salt" like table salt. It is Sodium Chloride
Hope this helps!
Cubic crystal is your answer.

A primary healthcare provider prescribes a urinalysis for a client with an indwelling catheter. to ensure that an appropriate specimen is obtained, the nurse would obtain the specimen from which site?

Answers

The nurse should obtain the specimen from the catheter.

One of the tests from urinalysis that frequently got contaminated is about infection. The area near the orificium of uretra is near the skin, so there will be microbes around it that can contaminate the sample. The contaminated sample will give a false positive and the result will show the urine are infected.
Taking the specimen from catheter will prevent that contamination, thus giving a better sample.

Answer:

The nurse should obtain the specimen from the catheter.

Explanation:

The current rapid loss of species is considered by many scientists to be another mass extinction. what may be causing this increase in extinction rate, beyond background extinction?

Answers

There have been 5 mass extinctions in the history of Earth, the main two are the K-T extinction (75% of the world organisms were killed) and the great paleozoic extinction. Scientists believe a massive meteorite caused the KT extinction but could also have been caused by some traps in India. The paleozoic extinction was believed to be caused by traps in Siberia which effected the temperature and atmospheric conditions of the tune

A patient presents with muscle twitching and cramping. on examination, the health care provider diagnoses the patient with calcium deficiency. which dietary instructions should the nurse give to this patient?

Answers

Dietary instructions: Increase the intake of dairy products, Take supplement with vitamin D, Increase the intake of tofu.

Deficiency of calcium is called hypoglycemia and can manifest as muscle twitching and cramping. By following those instructions the symptoms can disappear.
 Vitamin D allows the absorption of calcium in the intestines.
 Dairy products, tofu, beans, and spinach are good sources of calcium.

Gypsum and quartz can look very similar. which test can help you distinguish them?

Answers

The test that they can use in differentiating the gypsum and quartz which are considered to be minerals is the mineral test. The mineral test can differentiate the hardiness of the minerals, as well as their; acidity, magnetism, streak, specific gravity and even their tenacity.

Explain how both bottom-up and top-down processing are involved in the "crystal running on the beach" example.

Answers

Of the four approaches to object perception ottom-up processing than the others. Modern psychologists have suggested a connection between the Gestalt principles and past experience.Perception starts with bottom-up processing, which involves stimulation of the receptors, creating electrical signals that reach the visual receiving area of the brain. Perception also involves top-down processing, which originates in the brain.shifting attention by making eye movements. -determined by bottom-up processes such as stimulus salience and by top-down processes such as scene schemas and task demands, which influence how eye movements are directed to parts of a scene. examples of top-down processing: multiple personalities of a blob and finding faces in a landscape; how knowledge of a language makes it possible to perceive individual words; and how the perception of pain is influenced by things other than the pain stimulus

What maternal physiological changes can be observed initially during the postpartum period?

Answers

Physiological changes during pregnancy aid the adaptation of the cardiovascular system to the grown metabolic needs of the mother which enables adequate delivery of oxygenated blood to peripheral tissues and the fetus. In the postpartum period, the Hemodynamic parameters slowly return to its baseline values, but the full resolution may take in six months after giving birth. The blood volume also decreases by 10% within 3 days after giving birth. The hemoglobin level and the hematocrit will stabilize after 2 weeks. The systolic and diastolic pressure will stay the same from late pregnancy until 12 weeks postpartum. Within 2 weeks of postpartum, the systemic vascular resistance will increase by 30% 

Which is an example of acquisition of natural passive immunity?

Answers

The transfer of antibodies from a mother to the fetus. This occurs naturally, and since it is the transfer of antibodies, it is passive immunity. 

Science Help !Determining Total Magnification: The eye piece (ocular lens) you “looked” through on the virtual microscope had a power of 10x. If you were using the 4x objective lens, what would the total magnification before the specimen you are viewing? Show your work!!

Answers

Final answer:

The total magnification of a microscope can be determined by multiplying the power of the ocular lens by the power of the objective lens. In this case, with an ocular lens power of 10x and an objective lens power of 4x, the total magnification is 40x.

Explanation:

In microscopy, the total magnification is determined by multiplying the power of the ocular lens by the power of the objective lens. According to the question, the power of your ocular lens, which is the lens you look through, is 10x. The power of the objective lens, which is the one closer to the specimen, is 4x.

To calculate the total magnification, you simply multiply the ocular lens power by the objective lens power (10x * 4x), which gives you a total magnification of 40x. This means that the specimen you are viewing appears 40 times larger than its actual size when viewed through the microscope.

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Final answer:

The total magnification before the specimen can be determined by multiplying the magnification of the ocular lens by the magnification of the objective lens. In this case, the total magnification is 40x.

Explanation:

The total magnification before the specimen can be determined by multiplying the magnification of the ocular lens by the magnification of the objective lens. In this case, the ocular lens has a power of 10x and the objective lens has a power of 4x. Therefore, the total magnification before the specimen is:

Total magnification = Ocular magnification × Objective magnification

Total magnification = 10x × 4x = 40x

So, the total magnification before the specimen is 40x.

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A deficiency disease that illustrates the effect of integumentary system function on the structure of the skeletal system is

Answers

Rickets is the disease 

A deficiency disease that illustrates the effect of integumentary system function on the structure of the skeletal system is

Rickets is the disease  that illustrates the effect of integumentary system function on the structure of the skeletal system.It usually occur due to the lack of Vitamin D or calciumIt can be caused by a genetic defect or another health condition.

What is rickets?It is the softening and weakening of bones in children due to the deficiency of Vitamin D.It affect the bone development in children.It cause bone pain, poor growth and soft weak bones that can lead to bone deformities.

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The stomach select one:
a. secretes lipases that complete fat digestion.
b. serves as a temporary storage site
c. manufactures bile.
d. contents are highly alkaline.

Answers

I would say it's b.
stomach doesn't secrete lipase, only pancreas does.
stomach also doesn't manufactures bile, the liver does.
stomach contents are highly acidic , it's around pH 2.0 , which is completely opposite to alkaline

Ging, smaller-breed dogs are more likely to develop ______ than either larger-breed dogs or aging cats

Answers

"chronic valvular disease"

The chronic valvular disease may affect many breeds but is the most common in smaller breeds. Many aged dogs develop some valvular degeneration, but it is mostly on smaller breeds that heart symptoms come up. This is a degeneration most likely connected to genetic factors. 

What is the function associated with the indicated neural activity?

Answers

This activity creates graded potentials in the plasma membrane of a postsynaptic cell. The graded potentials are changes in the membrane potential. These come in all sizes. A postsynaptic cell is a membrane that gets a signal from the presynaptic cell.

A disorder characterized by hemorrhage diathesis is one in which insignificant injury leads to unusual bleeding.

Answers

Hemorrhagic diatheses is a disorder characterized by hemorrhage diathesis is one in which insignificant injury leads to unusual bleeding. This is also known as bleeding diathesis in which is an unusual bleeding due to hypocoagulability which is also caused by coagulopathy. 

Why is the liver such an important organ in a vertebrate’s biological system?

Answers

It helps clean up all the type of "bad guys" i would call it, if you didnt have the liver, well then.... you'll fine out ;)

A 26-year-old client who abuses heroin states to the nurse, "i have been using more heroin lately. i told my provider about it and they said i need more and more heroin to feel the effect i want

Answers

The nurse should explain to the client as to why heroin shouldn't be avoided and not used like how the client uses it as it shows negative effects that could lead to complications. The nurse should also explain that the provider is not a professional that will be of help or someone he or she could listen to when taking the drug as he or she is not a medial expert or professional to prove or state.

A direct indication that the white blood cells of the body are functioning would be

Answers

A direct indication that the white blood cells of the body are functioning would be a decrease in the number of pathogens in the body 

The immune system of a person is capable of fighting with infectious microorganisms and can easily protect the body from infectious diseases. This condition indicates that the white blood cells are functioning properly.

Further Explanation:

The foreign particles can be either microbial pathogens or dust particles and pollens. Depending on the type of foreign body, the innate immune system functions. The physical barriers like skin, mucous membranes, and lungs help in preventing foreign particle entry. The pathogens are removed by the action of immune cells called white blood cells (monocytes, macrophages, dendritic cells, mast cells, and polymorphonuclear leukocytes). In a healthy individual, the total WBC (white blood cell) count ranges between 4,500 to 11,000/. When an infection is caused, or the person has some allergy, this count is increased.

The effective immune system is fighting with any microorganism or damage that can efficiently protect the body by releasing certain chemicals. The damaged host cells also release certain chemicals (vasoactive factors) like histamine, prostaglandins, and bradykinin. This causes the movement of the fluid in the extracellular spaces. All these factors cause an increase in blood flow and fluid retention (that cause edema). The increased vascular permeability helps the WBCs to reach that area easily.The neutrophils that are delivered to the inflammation site phagocytize microbes and kill it.

Learn More:

1. Learn more about the treatment of eukaryotic cell with a drug https://brainly.com/question/10767798

2. Learn more about the proteins synthesis in a cell https://brainly.com/question/1420458

3. Learn more about the exchange of gases by blood cells https://brainly.com/question/1213217

Answer Details:

Grade: High School

Subjects: Biology

Chapter: Immunology

Keywords:

White blood cell, immune system, infection, neutrophils, lungs, foreign particle, damage, kill, phagocytize, histamine, prostaglandins.

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