How do extinctions or new species affect species richness?

How do extinctions or new species affect species richness?
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Which of the following is the most important cause of animals and plants being driven to extinction? (a) Habitat loss and fragmentation (b) Co-extinctions (c) Over-exploitation (d) Alien species invasion

Description : Which of the following is the most important cause of animals and plants being driven to extinction? (a) Habitat loss and fragmentation (b) Co-extinctions (c) Over-exploitation (d) Alien species invasion

Last Answer : (a) Habitat loss and fragmentation

Recent discoveries of ancient cratering near the Yucatan Peninsula support the theory that a meteor or cometary impact may have resulted in mass extinctions of species on Earth about 65 million years ago. During which geologic period is that impact thought to have occurred? w) Permian x) Triassic y) Jurassic z) Cretaceous

Description : Recent discoveries of ancient cratering near the Yucatan Peninsula support the theory that a meteor or cometary impact may have resulted in mass extinctions of species on Earth about 65 million years ago. ... is that impact thought to have occurred? w) Permian x) Triassic y) Jurassic z) Cretaceous 

Last Answer : ANSWER: Z -- CRETACEOUS 

How might extinctions affect the evolution of organisms that survive the event?

Description : How might extinctions affect the evolution of organisms that survive the event?

Last Answer : The role of mass extinction in evolution. At the most basic level, mass extinctions reduce diversity by killing off specific lineages, and with them, any descendent species they might have given ... mass extinction can also play a creative role in evolution, stimulating the growth of other branches.

The relation between specises richness and area is described on a logarithmic scale by the equation [where S = species richness, A = area, Z = slope o

Description : The relation between specises richness and area is described on a logarithmic scale by the equation [where S = species richness, A = area, Z = slope o

Last Answer : The relation between specises richness and area is described on a logarithmic scale by the equation [where S = species ... D. log S = log C + Z log A

Which one of the following is not observed in biodiversity hotspots? (a) Lesser inter-specific competition (b) Species richness (c) Endemism (d) Accelerated species loss

Description : Which one of the following is not observed in biodiversity hotspots? (a) Lesser inter-specific competition (b) Species richness (c) Endemism (d) Accelerated species loss

Last Answer : (a) Lesser inter-specific competition

Consider the following statements (A – D) each with one or two blanks. (A) Bears go into (1) during winter to (2) cold weather. (B) A conical age pyramid with a broad base represents (3) human population. (C) A wasp pollinating a fig flower is an example of (4) . (D) An area with high levels of species richness is known as (5) .

Description : Consider the following statements (A - D) each with one or two blanks. (A) Bears go into (1) during winter to (2) cold weather. (B) A conical age pyramid with a broad base represents (3) human population. ... example of (4) . (D) An area with high levels of species richness is known as (5) .

Last Answer : (D) An area with high levels of species richness is known as (5) .

Select the correct statement about biodiversity. (a) The desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rare animals. (b) Large scale planting of Bt cotton has no adverse effect on biodiversity. (c) Western ghats have a very high degree of species richness and endemism. (d) Conservation of biodiversity is just a fad pursued by the developed countries.

Description : Select the correct statement about biodiversity. (a) The desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rare animals. (b) Large scale ... and endemism. (d) Conservation of biodiversity is just a fad pursued by the developed countries.

Last Answer : (c) Western ghats have a very high degree of species richness and endemism.

What term did Lengl and Daft use for failure when face-to-face talking is used to convey routine messages? (a) Data richness ; (b) Channel richness ; (c) Data processing ; (d) Data glut

Description : What term did Lengl and Daft use for failure when face-to-face talking is used to convey routine messages? (a) Data richness ; (b) Channel richness ; (c) Data processing ; (d) Data glut

Last Answer : (d) Data glut

How does the extinction of a species affect humans?

Description : How does the extinction of a species affect humans?

Last Answer : Extinction contributes to the loss of natural food sources.

Why can the removal of one important species affect an entire Eco system?

Description : Why can the removal of one important species affect an entire Eco system?

Last Answer : Need answer

Study the four statements (A-D) given below and select the two correct ones out of them. A. Definition of biological species was given by Ernst Mayr. B. Photoperiod does not affect reproduction in plants. C. Binomial nomenclature system was given by R.H. Whittaker. D. In unicellular organisms, reproduction is synonymous with growth. The two correct statements are (a) B and C (b) C and D (c) A and D (d) A and B.

Description : Study the four statements (A-D) given below and select the two correct ones out of them. A. Definition of biological species was given by Ernst Mayr. B. Photoperiod does not affect reproduction in plants. C. Binomial nomenclature ... are (a) B and C (b) C and D (c) A and D (d) A and B.

Last Answer : (c) A and D

Bacterial species in fish are naturally adapted to the cold environment in which most fish live and thus, _____ will not affect them; _____ is preferred. a. heating, cooking b. cooling, refrigeration c. warming, boiling d. cooling, freezing

Description : Bacterial species in fish are naturally adapted to the cold environment in which most fish live and thus, _____ will not affect them; _____ is preferred. a. heating, cooking b. cooling, refrigeration c. warming, boiling d. cooling, freezing

Last Answer : d. cooling, freezing