What type of cells did multi cellular organisms arise?

What type of cells did multi cellular organisms arise?
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Mention the two methods of co-ordination of organ system in multi-cellular organisms.

Description : Mention the two methods of co-ordination of organ system in multi-cellular organisms.

Last Answer : Co-ordination of various organ systems in multi-cellular organisms is brought about in two ways a) Control by nervous system b) Control by endocrine system

Cell theory includes all of the following except A.all organisms are composed of one or more cells B.the cell is the most primitive form of life C.the cell is the structural unit of life D.cells arise by division of preexisting cells

Description : Cell theory includes all of the following except A.all organisms are composed of one or more cells B.the cell is the most primitive form of life C.the cell is the structural unit of life D.cells arise by division of preexisting cells

Last Answer : B.the cell is the most primitive form of life

Cell theory includes all of the following except A- .all organisms are composed of one or more cells B- the cell is the most primitive form of life C- .the cell is the structural unit of life D- cells arise by division of preexisting cells

Description : Cell theory includes all of the following except A- .all organisms are composed of one or more cells B- the cell is the most primitive form of life C- .the cell is the structural unit of life D- cells arise by division of preexisting cells

Last Answer : the cell is the most primitive form of life

$ Cellular totipotency means that single cell can give rise to a fully grown multicellular organisms ! Meristematic cells are also called "stem cells"

Description : $ Cellular totipotency means that single cell can give rise to a fully grown multicellular organisms ! Meristematic cells are also called "stem cells"

Last Answer : $ Cellular totipotency means that single cell can give rise to a fully grown multicellular organisms ! Meristematic ... D. If both As and R are wrong.

All multi-celled organisms have 2,000 cells?

Description : All multi-celled organisms have 2,000 cells?

Last Answer : FALSE

Mention the characteristics of multi-cellular algae.

Description : Mention the characteristics of multi-cellular algae.

Last Answer : a) Algae are autotrophic organisms. b) They have green pigment chlorophyll. c) They are major producers in marine ecosystem. d) They are non-vascular plants. e) They have a ... of male and female gametes. Example: Spirogyra, Ulothrix, Batrachospermum, Polysiphonia, Sargassum and Ectocarpus.

The most significant reason why fungi are not in the kingdom Plantae is that fungiA- .are chemoorganotrophic heterotrophs B- have unicellular and multi-cellular forms C- are prokaryotes D- are eukaryotes

Description : The most significant reason why fungi are not in the kingdom Plantae is that fungiA- .are chemoorganotrophic heterotrophs B- have unicellular and multi-cellular forms C- are prokaryotes D- are eukaryotes

Last Answer : .are chemoorganotrophic heterotrophs

Who first showed that cells arise only from pre existing cells? -Biology

Description : Who first showed that cells arise only from pre existing cells? -Biology

Last Answer : answer:

$ Rudolf Virchow was the first to propose that new cells arise only from the pre-existing cells. ! Dividing cells have a low content of DNA.

Description : $ Rudolf Virchow was the first to propose that new cells arise only from the pre-existing cells. ! Dividing cells have a low content of DNA.

Last Answer : $ Rudolf Virchow was the first to propose that new cells arise only from the pre-existing cells. ! Dividing ... wrong D. If both As and R are wrong.

Apomictic embryos in Citrus arise from (a) synergids (b) maternal sporophytic tissue in ovule (c) antipodal cells (d) diploid egg.

Description : Apomictic embryos in Citrus arise from (a) synergids (b) maternal sporophytic tissue in ovule (c) antipodal cells (d) diploid egg.

Last Answer : (b) maternal sporophytic tissue in ovule

Assertion: That branch of science which deals with the study of living organisms is called Biology. Reason: Living organisms always have cellular orga

Description : Assertion: That branch of science which deals with the study of living organisms is called Biology. Reason: Living organisms always have cellular orga

Last Answer : Assertion: That branch of science which deals with the study of living organisms is called Biology. Reason: ... wrong D. If both As and R are wrong.

How did scientists decide that DNA was the genetic material for all cellular organisms?

Description : How did scientists decide that DNA was the genetic material for all cellular organisms?

Last Answer : The proof that the material basis for a gene is DNA came from the work of Oswald T.Avery (1877-1955), Colin M. MacLeod (1909-1972), and Maclyn McCarty (1911-) in a paper published ... exposed to DNase, an enzyme that destroys DNA, all transformation activity ceased. The transforming factor was DNA.

What Multi cell living organisms have lived on earth for how many years?

Description : What Multi cell living organisms have lived on earth for how many years?

Last Answer : What is the answer ?

Which of the following statement(s) is/are true concerning the pulmonary response to shock? a. The acute pulmonary vascular response to shock differs markedly from that of systemic vasculature b. The pulmonary edema of ARDS occurs in the face of elevated left heart pressures c. The initial physiologic changes of ARDS involve the capillary endothelial cells and the type I pneumocyte d. Mechanisms proposed in the pathogenesis of ARDS include injury from mediators of inflammation elsewhere and from activated cellular elements e. A decrease in lung compliance may result from the loss of type I pneumocytes

Description : Which of the following statement(s) is/are true concerning the pulmonary response to shock? a. The acute pulmonary vascular response to shock differs markedly from that of systemic vasculature b. The ... elements e. A decrease in lung compliance may result from the loss of type I pneumocytes

Last Answer : Answer: c, d, e Contributing pathophysiologic processes to the pulmonary manifestations of shock include the pulmonary component of the cardiovascular response, disruption of the normal ... injury from mediators of inflammation elaborated elsewhere, and from activated cellular blood elements

What type of health problems arise from groin pain?

Description : What type of health problems arise from groin pain?

Last Answer : There are many serious problems that may arise from groin pain. Increased pain over time in the groin area could signify a STD (sexually transmitted disease).

What type of defect arise when a solid is heated? Which physical property is affected by it and what way ?

Description : What type of defect arise when a solid is heated? Which physical property is affected by it and what way ?

Last Answer : Vacancy defect is created, it is because on heating some atoms leaved the lattice site completely also the density decreases.

What type of defect can arise when a solid is heated ? Which physical property is affected by this and in what way ?

Description : What type of defect can arise when a solid is heated ? Which physical property is affected by this and in what way ?

Last Answer : When a solid is heated vacancy defect arises. This is because on heating some atoms or ions leacve the lattice site completely some lattice sites are vacant. As a result of this defect the density of the substance decreases, because some atoms leave the structure completely.

What do animals with the carbon dioxide produced in their cells during cellular respiration?

Description : What do animals with the carbon dioxide produced in their cells during cellular respiration?

Last Answer : oof

In all living cells DNA controls cellular activity by?

Description : In all living cells DNA controls cellular activity by?

Last Answer : regulating the order of amino acids in protein molecules.

What cellular interactions are the cells of the stratum basale firmly attached to the plasma membrane?

Description : What cellular interactions are the cells of the stratum basale firmly attached to the plasma membrane?

Last Answer : Need answer

What Besides glucose what molecule is required for cells to perform cellular respiration?

Description : What Besides glucose what molecule is required for cells to perform cellular respiration?

Last Answer : Need answer

The initiation of a humoral immune response involves a complex interaction of the antigen, cells and intercellular messengers. Which of the following statement(s) concerning the initiation of the humoral immune response is/are correct? a. Helper T lymphocytes stimulate B lymphocytes through secretion of cytokines such as interleukin 4 and 6 b. A number of cells can aid in presenting the antigen to the helper T cell including B lymphocytes and macrophages c. All antigens require coordinated efforts of the various cellular components of the immune system d. An antigen must be a living microorganism

Description : The initiation of a humoral immune response involves a complex interaction of the antigen, cells and intercellular messengers. Which of the following statement(s) concerning the initiation of the ... various cellular components of the immune system d. An antigen must be a living microorganism

Last Answer : Answer: a, b Stimulation of the immune system occurs after a variety of antigen-presenting cells (B lymphocytes, macrophages, dendritic cells, and Langerhans cells) act to engulf ... polysaccharides), most antigens require coordinated efforts of the various cellular components of the immune system

The following statement(s) is/are true concerning cellular defense mechanisms. a. Macrophages function solely as antigen processing cells in the initial reaction to exposure to an antigen b. Macrophages may become activated and secrete cytokines c. Macrophages serve as phagocytic cells in the tissues but not within the bloodstream d. Polymorphonucleocytes (PMNS) are normally present in only small numbers within the tissue and enter an area of infection through diapedesis

Description : The following statement(s) is/are true concerning cellular defense mechanisms. a. Macrophages function solely as antigen processing cells in the initial reaction to exposure to an antigen b. Macrophages ... in only small numbers within the tissue and enter an area of infection through diapedesis

Last Answer : Answer: b, d A wide variety of cell types serve to provide host defense at several levels. Macrophages act as the initial antigen processing cell that serves to ... through diapedesis after chemotactic stimuli are excluded by macrophages, bacterial breakdown products, and complement activation

In cellular system, _____ defines the geographic distance that is required between cells using identical frequencies in order to avoid interference between the radio transmissions at these cells. A. frequency-reuse ratio B. distance-to-reuse ratio (D/R) C. reuse format plan ratio D. reuse factor

Description : In cellular system, _____ defines the geographic distance that is required between cells using identical frequencies in order to avoid interference between the radio transmissions at these cells. A. frequency-reuse ratio B. distance-to-reuse ratio (D/R) C. reuse format plan ratio D. reuse factor

Last Answer : B. distance-to-reuse ratio (D/R)

Proto-oncogenes are: B A. DNA sequences in cells that are oncogenes themselves B. Cellular copies of genes that were first found in oncogenic retroviruses C. DNA viral sequences that are known to infect human cells D. Bacterial DNA counterparts

Description : Proto-oncogenes are: B A. DNA sequences in cells that are oncogenes themselves B. Cellular copies of genes that were first found in oncogenic retroviruses C. DNA viral sequences that are known to infect human cells D. Bacterial DNA counterparts

Last Answer : Cellular copies of genes that were first found in oncogenic retroviruses

Neoplasms are best characterized as: C A. Malignant tumors B. A proliferation of cells that is characterized by its ability to invade contiguous structures C. A cellular proliferation in which growth is for the most part autonomous D. None of these

Description : Neoplasms are best characterized as: C A. Malignant tumors B. A proliferation of cells that is characterized by its ability to invade contiguous structures C. A cellular proliferation in which growth is for the most part autonomous D. None of these

Last Answer : A cellular proliferation in which growth is for the most part autonomous

Cellular totipotency is demonstrated by (a) only gymnosperm cells (b) all plant cells (c) all eukaryotic cells (d) only bacterial cells.

Description : Cellular totipotency is demonstrated by (a) only gymnosperm cells (b) all plant cells (c) all eukaryotic cells (d) only bacterial cells.

Last Answer : (b) all plant cells

Which is correct about cell theory in view of current status of our knowledge about cell structure? (a) It needs modification due to discovery of subcellular structures like chloroplasts and mitochondria. (b) Modified cell theory means that all living being are composed of cells capable of reproducing. (c) Cell theory does not hold good because all living beings (e.g., viruses) do not have cellular organisation. (d) Cell theory means that all living objects consists of cells whether or not capable of reproducing

Description : Which is correct about cell theory in view of current status of our knowledge about cell structure? (a) It needs modification due to discovery of subcellular structures like chloroplasts and ... Cell theory means that all living objects consists of cells whether or not capable of reproducing

Last Answer : (c) Cell theory does not hold good because all living beings (e.g., viruses) do not have cellular organisation.

Hashimoto disease and Graves‘ disease are similar in that both a. Affect the thyroid gland. b. Affect the red blood cells. c. Are forms of cellular hypersensitivity? d. Are accompanied by histamine release.

Description : Hashimoto disease and Graves‘ disease are similar in that both a. Affect the thyroid gland. b. Affect the red blood cells. c. Are forms of cellular hypersensitivity? d. Are accompanied by histamine release.

Last Answer : b. Affect the red blood cells.

During the course of a cellular hypersensitivity a. Antibodies react with antigens in tissues. b. Serotonin and histamine are released by cells. c. Immune complexes form on blood vessel surfacesd. A skin thickening called an induration may form..

Description : During the course of a cellular hypersensitivity a. Antibodies react with antigens in tissues. b. Serotonin and histamine are released by cells. c. Immune complexes form on blood vessel surfaces. d. A skin thickening called an induration may form.

Last Answer : b. Serotonin and histamine are released by cells.

._________ cells are associated with immunity while_____________ cells are part of___________ immunity. a. B; cell-mediated; T; innate b. T; humoral; B; cellular c. T; cell-mediated; B; humoral d. T; humoral; B; nonspecific

Description : ._________ cells are associated with immunity while_____________ cells are part of___________ immunity. a. B; cell-mediated; T; innate b. T; humoral; B; cellular c. T; cell-mediated; B; humoral d. T; humoral; B; nonspecific

Last Answer : c. T; cell-mediated; B; humoral

Which of the following is a cellular barrier in the innate defense system? a. macrophages b. Erythrocytes c. B-cellsd. T-cells

Description : Which of the following is a cellular barrier in the innate defense system? a. macrophages b. Erythrocytes c. B-cells d. T-cells

Last Answer : a. macrophages

If cells can use oxygen in cellular respiration it is called _____. a. Anaerobic Respiration b. Alcoholic Fermentation c. Acid Fermentation d. Aerobic Respiration

Description : If cells can use oxygen in cellular respiration it is called _____. a. Anaerobic Respiration b. Alcoholic Fermentation c. Acid Fermentation d. Aerobic Respiration

Last Answer : c. Acid Fermentation

Which of the following statements supports the cell theory? a. all living things are made of cells b. all living things have a chromosome in the nucleus c. all living things have cellular metabolism in the mitochondria d. A-C are correct

Description : Which of the following statements supports the cell theory? a. all living things are made of cells b. all living things have a chromosome in the nucleus c. all living things have cellular metabolism in the mitochondria d. A-C are correct

Last Answer : a. all living things are made of cells

Which of the following responses identifies a role of T lymphocytes? a) Transplant rejection Transplant rejection and graft-versus-host disease are cellular response roles of T cells.

Description : Which of the following responses identifies a role of T lymphocytes? a) Transplant rejection Transplant rejection and graft-versus-host disease are cellular response roles of T cells. ... ) Bacterial phagocytosis and lysis Bacterial phagocytosis and lysis are humoral response roles of Blymphocytes.

Last Answer : a) Transplant rejection Transplant rejection and graft-versus-host disease are cellular response roles of T cells.

Ductal lavage is used for a) women at higher risk for benign proliferative breast disease. Performed in the doctor’s office, a microcatheter is inserted through the nipple while instilling saline and retrieving the fluid for analysis. It has been shown to identify atypical cells in this population and has been found to be adept at detecting cellular changes within the breast tissue.

Description : Ductal lavage is used for a) women at higher risk for benign proliferative breast disease. Performed in the doctor's office, a microcatheter is inserted through the nipple while instilling saline ... risk for benign proliferative breast disease; it is not specific for women with breast implants.

Last Answer : a) women at higher risk for benign proliferative breast disease. Performed in the doctor's office, a microcatheter is inserted through the nipple while instilling saline and retrieving the fluid ... population and has been found to be adept at detecting cellular changes within the breast tissue.

During which step of cellular carcinogenesis do cellular changes exhibit increased malignant behavior? a) Progression During this third step, cells show a propensity to invade adjacent tissues and metastasize. b) Promotion During promotion, repeated exposure to promoting agents causes the expression of abnormal genetic information even after long latency periods. c) Initiation During this first step, initiators such as chemicals, physical factors, and biologic agents escape normal enzymatic mechanisms and alter the genetic structure of cellular DNA. d) Prolongation No stage of cellular carcinogenesis is termed prolongation.

Description : During which step of cellular carcinogenesis do cellular changes exhibit increased malignant behavior? a) Progression During this third step, cells show a propensity to invade adjacent tissues and ... of cellular DNA. d) Prolongation No stage of cellular carcinogenesis is termed prolongation.

Last Answer : a) Progression During this third step, cells show a propensity to invade adjacent tissues and metastasize.

Eukaryotic cells have extensive intracellular membranes, termed the endomembrane system, which divide the cell into structurally and functionally distinct compartments, or organelles. These include the inner cell membrane, nuclear envelope, endoplasmic reticulum, the Golgi apparatus, and lysosomes. Name a cellular component whose membrane is not part of the endomembrane system.

Description : Eukaryotic cells have extensive intracellular membranes, termed the endomembrane system, which divide the cell into structurally and functionally distinct compartments, or organelles. These include the inner cell ... . Name a cellular component whose membrane is not part of the endomembrane system.

Last Answer : Mitochondria; also chloroplasts

Read the following (A-D) statements. A. It is made of more than one layer (multi-layered) of cells. B. It has a limited role in secretion and absorpti

Description : Read the following (A-D) statements. A. It is made of more than one layer (multi-layered) of cells. B. It has a limited role in secretion and absorpti

Last Answer : Read the following (A-D) statements. A. It is made of more than one layer (multi-layered) of cells. B. ... cavity. A. Four B. Three C. Two D. One

Are there future geopolitical implications that arise from China's one child/forced abortion policy?

Description : Are there future geopolitical implications that arise from China's one child/forced abortion policy?

Last Answer : I’m sure there many men like this in the U.S., so we can just observe them for an idea lol.

What medical problems could arise in this hypothetical scenario (see details)?

Description : What medical problems could arise in this hypothetical scenario (see details)?

Last Answer : answer:This seems like a more appropriate question for someone who does piercing rather than a medical question. Don't forget to consider the thickness of the skin when figuring out the outer dimension of the ... the raised part that is supposed to be exposed? Feel free to PM me with more details.

How did consciousness arise from the brain?

Description : How did consciousness arise from the brain?

Last Answer : Define consciousness please.

How did the idea to start circumcising men or women arise?

Description : How did the idea to start circumcising men or women arise?

Last Answer : You can’t really compare the two, you know. Female circumcision is really more like castration.

What complications will arise from personal on-line data storage in the near future?

Description : What complications will arise from personal on-line data storage in the near future?

Last Answer : Because of concerns about that, I have not used any online options for storage or back-up. I am curious to know what people who do use them think.

Why does the need for the development of a region arise ? Give any three points in support of your answer. -Geography

Description : Why does the need for the development of a region arise ? Give any three points in support of your answer. -Geography

Last Answer : The development of a region is required to improve economic, social, political and environmental conditions of the society present in the region. The development helps to increase general productivity ... income, efficiency of a worker, elimination of poverty and improvement in quality of life.

How did the consumer movement arise out of the dissatisfaction of the consumers? Explain. -SST 10th

Description : How did the consumer movement arise out of the dissatisfaction of the consumers? Explain. -SST 10th

Last Answer : (i) For a long time, due to unjust and inequitable practices followed by sellers, consumers were extremely dissatisfied. There was no legal system available to consumers to protect them ... awareness among consumers. Hence, the dissatisfaction of consumers gave rise to the consumer movements.

When did the conflict arise between the Moderates and the Assertives? -SST 10th

Description : When did the conflict arise between the Moderates and the Assertives? -SST 10th

Last Answer : The conflict between the two came to the surface in the Congress session held in 1906.

When did the conflict arise between the Moderates and the Assertives? -SST 10th

Description : When did the conflict arise between the Moderates and the Assertives? -SST 10th

Last Answer : The conflict between the two came to the surface in the Congress session held in 1906.

What is the function of receptors in our body ? Think of situations where receptors do not work properly. What problems are likely to arise ? [AICBSE 2016] -Biology-10

Description : What is the function of receptors in our body ? Think of situations where receptors do not work properly. What problems are likely to arise ? [AICBSE 2016] -Biology-10

Last Answer : Receptors are specialised cells located in our sense organs like ear, nose, skin, tongue and eyes. The function of receptors is to detect information from the environment. For example, olfactory ... hands might get burn as the damaged receptor cannot perceive the external stimuli of heat and pain.