Boreal Forest Activity
... Your task is to draw the ecosystem including the habitat as best you can. Once you have drawn the ecosystem, link the variety of species together with arrows to show the transfer of sunlight energy through a food web. Remember: the arrows point in the direction that the energy is moving (from prey t ...
... Your task is to draw the ecosystem including the habitat as best you can. Once you have drawn the ecosystem, link the variety of species together with arrows to show the transfer of sunlight energy through a food web. Remember: the arrows point in the direction that the energy is moving (from prey t ...
File
... holding prey 26. List the only 3 groups of organisms that can fly. Birds, bats, insects 27. Fg 28-28. Which insects have 1 pair of wings that are not used for flight? ...
... holding prey 26. List the only 3 groups of organisms that can fly. Birds, bats, insects 27. Fg 28-28. Which insects have 1 pair of wings that are not used for flight? ...
61BL3313 Population and Community Ecology
... Plants also supply ants with protein and fat-rich food in the form of Beltian bodies, shown here being harvested by ants (arrows) from the tips of newly expanding leaflets of Acacia cornigera ...
... Plants also supply ants with protein and fat-rich food in the form of Beltian bodies, shown here being harvested by ants (arrows) from the tips of newly expanding leaflets of Acacia cornigera ...
Predation, Herbivory, and Parasitism
... often spend most or all their lives eating tissues or body fluids of just one host individual. Sometimes multiple generations of parasites live on the same host. Because parasites depend on their hosts for continued feeding, they do not generally kill their hosts (at least not immediately). ...
... often spend most or all their lives eating tissues or body fluids of just one host individual. Sometimes multiple generations of parasites live on the same host. Because parasites depend on their hosts for continued feeding, they do not generally kill their hosts (at least not immediately). ...
The nature of adaptations
... – Lack of genetic variation – Genetic correlations among traits Example: genetic correlations • Sizes of different flower parts are correlated in radish • Very strong selection required to ‘break’ correlations and change shape of flowers Physiological constraint • Fuchsia flowers retained after poll ...
... – Lack of genetic variation – Genetic correlations among traits Example: genetic correlations • Sizes of different flower parts are correlated in radish • Very strong selection required to ‘break’ correlations and change shape of flowers Physiological constraint • Fuchsia flowers retained after poll ...
Name: Date
... Organisms in an ecosystem constantly interact. The three major types of interactions among the organisms in an ecosystem are ____________, _____________, and _____________. ...
... Organisms in an ecosystem constantly interact. The three major types of interactions among the organisms in an ecosystem are ____________, _____________, and _____________. ...
Species Interactions: Predation
... Interactions that increase the fitness of 1 organism at the expense of another 5 types of predation can be identified 1. Herbivores – animals that prey on green plants, seeds or fruits (plants often not killed but often damaged) 2. Carnivores – typical predation, 1 animal consumes another 3. Insect ...
... Interactions that increase the fitness of 1 organism at the expense of another 5 types of predation can be identified 1. Herbivores – animals that prey on green plants, seeds or fruits (plants often not killed but often damaged) 2. Carnivores – typical predation, 1 animal consumes another 3. Insect ...
Lecture 8 Exploitative and Mutualistic Species Interactions
... • Cheaters might negatively affect their partners, hence negatively affecting themselves. • Some mutualists have mechanisms to prevent over-exploitation(过度开 发). • Example yucca moth. Pollinates yucca and leaves some eggs. But if leaves too many eggs, whole flower drops. ...
... • Cheaters might negatively affect their partners, hence negatively affecting themselves. • Some mutualists have mechanisms to prevent over-exploitation(过度开 发). • Example yucca moth. Pollinates yucca and leaves some eggs. But if leaves too many eggs, whole flower drops. ...
Chapter 4 AND 5 Practice - North Salem Schools Teachers Module
... C) a crow feeds on the remains of a rabbit killed on the road D) a lion stalks, kills, and eats an antelope 16. Base your answer to the following question on the list of molecules below. Select the symbiosis, chosen from the list below, that is most closely associated with that ...
... C) a crow feeds on the remains of a rabbit killed on the road D) a lion stalks, kills, and eats an antelope 16. Base your answer to the following question on the list of molecules below. Select the symbiosis, chosen from the list below, that is most closely associated with that ...
BIT Assignment
... Animal Kingdom • Divided into two groups according to the presence or absence of backbone: – Invertebrates : without backbone – Vertebrates : with backbone ...
... Animal Kingdom • Divided into two groups according to the presence or absence of backbone: – Invertebrates : without backbone – Vertebrates : with backbone ...
Sample Exam I Key
... e. all of the above are true 28. Which of the following best expresses the concept of natural selection? a. “Old age and treachery will overcome youth and skill.” b. “Whoever has the most babies wins.” c. “Survival of the fittest” d. “Buyer beware.” e. “Abandon hope, all ye who enter here.” 29. Whi ...
... e. all of the above are true 28. Which of the following best expresses the concept of natural selection? a. “Old age and treachery will overcome youth and skill.” b. “Whoever has the most babies wins.” c. “Survival of the fittest” d. “Buyer beware.” e. “Abandon hope, all ye who enter here.” 29. Whi ...
Biodiversity - Houston ISD
... 16. Identify at least five organisms which were endangered but have recovered significantly. Explain why each has had a successful recovery. 17. What is the purpose of the Endangered Species Act (ESA) and when was it created? 18. What Federal agencies are responsible for implementing the ESA? 19. Ho ...
... 16. Identify at least five organisms which were endangered but have recovered significantly. Explain why each has had a successful recovery. 17. What is the purpose of the Endangered Species Act (ESA) and when was it created? 18. What Federal agencies are responsible for implementing the ESA? 19. Ho ...
Read Chapter 1 in the textbook (pages 4 – 21)
... 18) What is the difference between density-dependent deaths and density-independent deaths? Provide an example of each. _________________________________________________________________________ ________________________________________________________________________________________ _________________ ...
... 18) What is the difference between density-dependent deaths and density-independent deaths? Provide an example of each. _________________________________________________________________________ ________________________________________________________________________________________ _________________ ...
Species Interactions and Community Ecology
... • Mutualism: a relationship in which interacting species benefit from one another • Symbiosis: mutualism in which the organisms live in close physical contact - Plant roots and fungi - Coral polyps and algae (zooxanthellae) • Pollination: bees, bats, birds, and others transfer pollen from one flower ...
... • Mutualism: a relationship in which interacting species benefit from one another • Symbiosis: mutualism in which the organisms live in close physical contact - Plant roots and fungi - Coral polyps and algae (zooxanthellae) • Pollination: bees, bats, birds, and others transfer pollen from one flower ...
UNIT B: EVOLUTION
... Scientists can tell how closely related organisms are by studying their DNA There does not have to be that much of a difference in a gene sequence to be a different organism! ...
... Scientists can tell how closely related organisms are by studying their DNA There does not have to be that much of a difference in a gene sequence to be a different organism! ...
Lecture notes from week number 1
... biology, cell biology, protistology-protozoology, mathematics, statistics, ecological niche-modeling, and much more. The first part of parasitology probably was home-remedies, or at least cave remedies or, in the case of primates at the earliest evolutionary stages in Africa, an understanding that i ...
... biology, cell biology, protistology-protozoology, mathematics, statistics, ecological niche-modeling, and much more. The first part of parasitology probably was home-remedies, or at least cave remedies or, in the case of primates at the earliest evolutionary stages in Africa, an understanding that i ...
2 Bird Evolution - British Trust for Ornithology
... How do bird species multiply? A species is defined as populations whose members can interbreed with one another. So how does one species split into two? Islands provide natural experiments – ‘laboratories of evolution’ – that offer valuable insights into the origins of bird species. One of the most ...
... How do bird species multiply? A species is defined as populations whose members can interbreed with one another. So how does one species split into two? Islands provide natural experiments – ‘laboratories of evolution’ – that offer valuable insights into the origins of bird species. One of the most ...
Natural selection and evolution
... 2. Variation within species was important to the development of Darwin’s theory of evolution. Which statement does individual variation help explain? A Resources become limited over long periods of time. B Populations often increase rapidly and without warning. C Competition is fierce among members ...
... 2. Variation within species was important to the development of Darwin’s theory of evolution. Which statement does individual variation help explain? A Resources become limited over long periods of time. B Populations often increase rapidly and without warning. C Competition is fierce among members ...
10:4 Review Test
... _________ in the _________ stage. In deuterostomes it is lined with ___________ and originates at the __________ end in the ____________ stage. T/F " The endoderm of a sponge is called the choanocyte. ...
... _________ in the _________ stage. In deuterostomes it is lined with ___________ and originates at the __________ end in the ____________ stage. T/F " The endoderm of a sponge is called the choanocyte. ...
File
... Mimicry gives advantage to prey by allowing them to mimic or disguise themselves as something the predator is trying to avoid. For example, zebra butterflies lay eggs on passionflower leaves for baby caterpillars to eat once they hatch, but they do not lay eggs on leaves that already have eggs. Over ...
... Mimicry gives advantage to prey by allowing them to mimic or disguise themselves as something the predator is trying to avoid. For example, zebra butterflies lay eggs on passionflower leaves for baby caterpillars to eat once they hatch, but they do not lay eggs on leaves that already have eggs. Over ...
Introduction
... Mollusca are the second largest phylum of the animal kingdom, forming a major part of the world fauna. The Gastropoda is the only class of mollusks which have successfully invaded land. They are one of the most diverse groups of animals, both in shape and habit. Among gastropods , land snails(subcla ...
... Mollusca are the second largest phylum of the animal kingdom, forming a major part of the world fauna. The Gastropoda is the only class of mollusks which have successfully invaded land. They are one of the most diverse groups of animals, both in shape and habit. Among gastropods , land snails(subcla ...
Biology 14.2 How Biologists Classify Organisms
... evolved. For example, cladistics can be used to hypothesize the evolutionary development of winged birds. To do this, cladistics focuses on the nature of the characteristics in different groups of organisms. It looks at the traits that a group has in common and what traits are different. ...
... evolved. For example, cladistics can be used to hypothesize the evolutionary development of winged birds. To do this, cladistics focuses on the nature of the characteristics in different groups of organisms. It looks at the traits that a group has in common and what traits are different. ...
Describe
... prey – organism that is killed and eaten. (din din) prey adaptations – stay in groups, camouflage, warning color, defensive chemicals, shells ex. Deer, turtles pg 492-493 ...
... prey – organism that is killed and eaten. (din din) prey adaptations – stay in groups, camouflage, warning color, defensive chemicals, shells ex. Deer, turtles pg 492-493 ...
Allopatric Speciation
... Coelacanths were thought to have gone extinct in the Late Cretaceous (~65mya), but were rediscovered in 1938 off the coast of South Africa. 2 Known extant species. The coelacanth has been nicknamed a “living fossil”, because its fossils were found long before the actual discovery of a live specimen. ...
... Coelacanths were thought to have gone extinct in the Late Cretaceous (~65mya), but were rediscovered in 1938 off the coast of South Africa. 2 Known extant species. The coelacanth has been nicknamed a “living fossil”, because its fossils were found long before the actual discovery of a live specimen. ...
Dec 6 - University of San Diego
... Stability usually related to lifespan, reproductive rate Environmental factors ...
... Stability usually related to lifespan, reproductive rate Environmental factors ...
Coevolution
In biology, coevolution is ""the change of a biological object triggered by the change of a related object"". In other words, when changes in at least two species' genetic compositions reciprocally affect each other’s evolution, coevolution has occurred.There is evidence for coevolution at the level of populations and species. Charles Darwin briefly described the concept of coevolution in On the Origin of Species (1859) and developed it in detail in Fertilisation of Orchids (1862). It is likely that viruses and their hosts coevolve in various scenarios.However, there is little evidence of coevolution driving large-scale changes in Earth's history, since abiotic factors such as mass extinction and expansion into ecospaces seem to guide the shifts in the abundance of major groups. One proposed specific example was the evolution of high-crowned teeth in grazers when grasslands spread through North America - long held up as an example of coevolution. We now know that these events happened independently.Coevolution can occur at many biological levels: it can be as microscopic as correlated mutations between amino acids in a protein or as macroscopic as covarying traits between different species in an environment. Each party in a coevolutionary relationship exerts selective pressures on the other, thereby affecting each other's evolution. Coevolution of different species includes the evolution of a host species and its parasites (host–parasite coevolution), and examples of mutualism evolving through time. Evolution in response to abiotic factors, such as climate change, is not biological coevolution (since climate is not alive and does not undergo biological evolution).The general conclusion is that coevolution may be responsible for much of the genetic diversity seen in normal populations including: blood-plasma polymorphism, protein polymorphism, histocompatibility systems, etc.The parasite/host relationship probably drove the prevalence of sexual reproduction over the more efficient asexual reproduction. It seems that when a parasite infects a host, sexual reproduction affords a better chance of developing resistance (through variation in the next generation), giving sexual reproduction viability for fitness not seen in the asexual reproduction, which produces another generation of the organism susceptible to infection by the same parasite.Coevolution is primarily a biological concept, but researchers have applied it by analogy to fields such as computer science, sociology / international political economy and astronomy.