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L_0379
mammals
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FIGURE 14.16 Human placenta and fetus inside the uterus
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mammals
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FIGURE 14.17 Koala mother and baby in pouch
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mammals
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FIGURE 14.18 Monotremes: echidnas (left) and a platy- pus (right)
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primates
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FIGURE 14.19 Primates: mouse lemur (left) and gorilla (right)
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primates
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FIGURE 14.20 Non-prosimian primates: right) Tarsier, (from left to Squirrel monkey (New World monkey), Vervet (Old World mon- key), Orangutan (ape).
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primates
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FIGURE 14.21 This gibbon is specialized for swinging through trees from branch to branch.
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understanding animal behavior
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FIGURE 15.1 Examples of animal behavior: (clockwise from top left) flamingoes, frog, elephant seals, ducks.
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understanding animal behavior
T_2100
FIGURE 15.2 This honeybee will do a waggle dance when it returns to the hive to let the other bees in the hive know where it found food.
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understanding animal behavior
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FIGURE 15.3 Examples of innate behaviors in animals: (left to right) wasp building a nest, caterpillar making a cocoon, and baby birds gaping for food.
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understanding animal behavior
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FIGURE 15.4 The grasp reflex in a human baby
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understanding animal behavior
T_2104
FIGURE 15.5 These crows have learned through habituation that the scarecrow is harmless. They have become used to its being in this spot and learned that it is not dangerous.
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understanding animal behavior
T_2104
FIGURE 15.6 Observational learning explains how wolves know how to hunt as a group.
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understanding animal behavior
T_2105
FIGURE 15.7 Birds learn through conditioning to avoid eating monarch butterflies.
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understanding animal behavior
T_2106
FIGURE 15.8 Bear cubs play fighting
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understanding animal behavior
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FIGURE 15.9 Monkey using a stone tool to crack oyster shells
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types of animal behavior
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FIGURE 15.10 A sign language interpreter mainly uses his hands to communicate.
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types of animal behavior
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FIGURE 15.11 A cat uses body language and a hissing sound as a threat to potential predators.
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types of animal behavior
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FIGURE 15.12 A dog urinates on a tree to mark its territory.
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types of animal behavior
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FIGURE 15.13 Human facial expressions can communi- cate a range of emotions.
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types of animal behavior
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FIGURE 15.14 Some of the worker bees in a honeybee colony
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types of animal behavior
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FIGURE 15.15 Mouth-to-mouth transfer of food is com- mon in some species of ants.
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types of animal behavior
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FIGURE 15.16 A male sharp-tailed grouse does a courtship dance to attract a female for mating.
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types of animal behavior
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FIGURE 15.17 An emperor penguin father feeds his chick.
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types of animal behavior
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FIGURE 15.18 This ladybug is looking for a safe place to hibernate over the winter.
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types of animal behavior
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FIGURE 15.19 By hunting at night, owls can avoid com- peting with other hunting birds such as hawks.
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choosing healthy foods
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FIGURE 17.6 MyPlate
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choosing healthy foods
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FIGURE 17.7 Reading nutrition facts labels can help you choose healthy foods. Look at the nutrition facts label shown here. Do you think this food is a good choice for a healthy eating plan? Why or why not?
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choosing healthy foods
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FIGURE 17.8 This food label includes the list of ingre- dients in the food. The main ingredient is enriched wheat flour, followed by high- fructose corn syrup. Why should you avoid foods with ingredients such as these at the top of the ingredients list?
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choosing healthy foods
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FIGURE 17.9 Walking the dog is a good way to add exercise to your daily routine.
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communities
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FIGURE 23.8 Pack of wolves preying on a moose
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communities
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FIGURE 23.9 Predator-Prey populations.
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communities
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FIGURE 23.10 Prairie dogs are a keystone species in their community.
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communities
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FIGURE 23.11 There is a well-camouflaged frog in this photo. Do you see it?
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communities
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FIGURE 23.12 These species of birds have evolved different types of beaks to exploit different food sources. This allows them to live in the same area without competing for food.
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communities
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FIGURE 23.13 A clownfish takes refuge among the tentacles of a sea anemone.
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communities
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FIGURE 23.14 Hookworm parasites inside their human hosts intestines
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communities
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FIGURE 23.15 A cattle egret hangs out near cattle to catch insects stirred up by the cattles feet.
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ecosystems
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FIGURE 23.16 The grass and deer fill two different niches in an ecosystem.
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flow of energy
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FIGURE 24.1 The green streaks in this brilliant blue Guatemalan lake are billions of photosyn- thetic bacteria.
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flow of energy
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FIGURE 24.2 Grizzly bears eat both plant and animal foods, including grasses, berries, fish, and clams.
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flow of energy
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FIGURE 24.3 These dung beetles are detritivores. They are feasting on a pile of horse dung (feces).
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flow of energy
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FIGURE 24.4 Terrestrial (left) and aquatic (right) food chains
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flow of energy
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FIGURE 24.5 Food web showing trophic levels
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flow of energy
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FIGURE 24.6 This ecological pyramid shows how en- ergy and biomass decrease from lower to higher trophic levels.
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flow of energy
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A food chain diagram shows the energy flow through ecosystems. It represents feeding relationships. Producers are living organisms that produce food for other species. The producer in this diagram is the plant. Consumers are organisms that depend on other living things for food. The primary consumers of the plant are the mice, caterpillars and aphids. They in turn are the food for the secondary consumers. The secondary consumers in this diagram are the owl, the kookaburra and the sparrow. The eagle is the tertiary consumer in this diagram. Most organisms consume and are consumed by more than one species so food chain diagrams are usually simpler than what happens in nature.
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flow of energy
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Energy is the ability to change or move matter. Every living thing needs energy to survive and grow. Food chains such as this one here have many intersecting pathways. Realistically in nature, many different plants and animals are eaten by a number of other such living things. As you can see in this diagram, rabbits, mice and grasshoppers all eat the grass. Additionally, hawks eat snakes, sparrows and frogs. This is all the natural way of life and exhibits the term survival of the fittest. This term means that the more dominant consumer will survive.
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flow of energy
DD_0172
The diagram we observe is that of a food web. A food web is nothing but a system of interlocking and interdependent food chains. In this food web, we observe 2 plants/fruits at the lowest level, namely Plantain and Berries. Plantain is consumed by Grasshoppers, Rabbits and Mouse. Berries on the other hand are consumed by Grasshoppers again, Titmouse, Butterflies and Greenflies. In the next level of the food web, the Grasshoppers are eaten by frogs, Rabbits and Mouse by Buzzard and Fox, Greenfly by Ladybird, Butterfly by Frogs and Titmouse by Snakes. The Ladybird is eaten by Dragonfly and the Dragonfly in turn is eaten by Frogs. The Frogs are consumed by Snakes and the Snake in turn is eaten by Buzzard. The Fox and Buzzard also feed on Titmouse, thus making them the topmost in the food web.
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flow of energy
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This diagram exhibits the flow of energy concept. As seen the hawk eats the snake, mouse and decomposers. Additionally, the deer eat decomposers and trees to survive. The mouse is eaten by snakes, hawks and owls. The owl eats the frog which eats the cricket which eats decomposers. This is part of the cycle of life. Therefore, an ecosystem is depicted. An ecosystem is a group of living things living in their habitat.
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flow of energy
food_chains_webs_6060
The diagram shows an example of a food web. A food web shows the different pathways energy flows through an ecosystem. Because plants produce their own food as well as food for animals, they are called producers. Because animals eat other living things, they are called consumers. There are different kinds of animals based on what they consume. Animals that consume plants are called herbivores. Animals that consume other animals are called carnivores. Animals that consume both plants and animals are called omnivores. There are many different food chains in a food web. A food chain shows how energy flows from a producer, to a primary consumer, then to a secondary consumer, then to a tertiary consumer, and so on, until it reaches the top of the food chain. For example, the diagram shows that plants, the producers, are eaten by herbivorous insects, the primary consumers. The herbivorous insects are then eaten by insectivorous birds, the secondary consumers. Finally, the insectivorous birds are eaten by hawks and owls, the tertiary consumers.
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ecosystem change
T_2419
FIGURE 24.12 Lichen growing on bare lava rocks
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ecosystem change
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FIGURE 24.13 Just a few months after a forest fire, fireweed and other pioneer plants are already growing among the charred tree trunks.
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biodiversity and extinction
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FIGURE 25.14 This coral reef (top) and tropical rainforest (bottom) have a tremendous variety of different species.
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biodiversity and extinction
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FIGURE 25.15 Water strider insect
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biodiversity and extinction
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FIGURE 25.16 A bee pollinates a flowering plant.
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biodiversity and extinction
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FIGURE 25.17 Bison graze on grasses in a tall-grass prairie nature preserve in Okla- homa.
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biodiversity and extinction
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FIGURE 25.18 Purple loosestrife is a European wildflower that was introduced to North America in the early 1800s. It soon spread to take over wetland habitats throughout the U.S. and Canada. Purple loosestrife replaces native wetland plants and threatens native wildlife by eliminating natural foods and cover. It also blocks irrigation systems.
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mendels discoveries
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FIGURE 6.1 Gregor Mendel
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mendels discoveries
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FIGURE 6.2 Traits Mendel studied in peas
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mendels discoveries
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FIGURE 6.3 Mendels flower color experiment
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mendels discoveries
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FIGURE 6.4 Seed color: B = yellow (dominant); b = green (recessive)
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mendels discoveries
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FIGURE 6.5 F2 plants produced when F1 plants self- pollinate
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introduction to genetics
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FIGURE 6.6 This diagram shows how genes and alle- les are related.
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introduction to genetics
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FIGURE 6.7 Gametes from a heterozygote parent (Bb)
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introduction to genetics
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FIGURE 6.8 Punnett square for two Bb parents
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introduction to genetics
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FIGURE 6.9 Codominance (left) and incomplete domi- nance (right)
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introduction to genetics
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FIGURE 6.10 Skin color darkens when exposed to the sun.
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introduction to genetics
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FIGURE 6.11 Inheritance of sex chromosomes
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advances in genetics
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FIGURE 6.13 Human Genome Project logo
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advances in genetics
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FIGURE 6.14 Abraham Lincoln (center) may have had the genetic disorder Marfan syndrome
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advances in genetics
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FIGURE 6.15 The enzyme DNA ligase joins together a gene and bacterial (plasmid) DNA. The DNA that results is called recombinant DNA.
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advances in genetics
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FIGURE 6.16 Bacteria are modified to produce the hu- man protein cytokine. This is a protein that helps fight infections.
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archaea
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FIGURE 8.16 Archaea that live around hydrothermal vents like this one must be able to with- stand extreme heat and acidity.
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archaea
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FIGURE 8.17 The water in Mono Lake is alkaline, or basic.
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archaea
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FIGURE 8.18 Cows like this one can digest cellu- lose only with the help of archaean methanogens.
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alligators and crocodiles
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FIGURE 1.1 Nile crocodiles display the basic crocodil- ian body plan.
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amphibians
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FIGURE 1.1
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angiosperms
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FIGURE 1.1
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angiosperms
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FIGURE 1.2 Part stigma Definition The part of the carpel where the pollen must land for fertilization to occur. Tube that makes up part of the carpel. Large bottom part of the carpel where the ovules are contained. Part of the ovary that is the female gametophyte and that after fertilization becomes the seed.
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angiosperms
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FIGURE 1.3
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animal behaviors
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FIGURE 1.1
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animal communication
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FIGURE 1.1 This chimpanzee is communicating with his face. His expression is called a fear grin. It tells other chimpanzees that he is not a threat.
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animal communication
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FIGURE 1.2
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animal communication
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FIGURE 1.3
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animal like protists
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FIGURE 1.1
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arachnids
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FIGURE 1.1
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arthropods
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FIGURE 1.1
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arthropods
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FIGURE 1.2 The blue American lobster illustrates the segmented body plan of the arthropods.
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basic and applied science
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FIGURE 1.1
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basic and applied science
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FIGURE 1.2
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biotechnology in agriculture
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FIGURE 1.1
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bird reproduction
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FIGURE 1.1
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bird reproduction
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FIGURE 1.2
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birds
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FIGURE 1.1
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birds
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FIGURE 1.2
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birds
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FIGURE 1.3 About 60 living bird species are flightless, such as penguins, as were many extinct birds. Flightlessness often evolves when birds live on isolated islands. The absence of land predators might make flying no longer necessary. Other birds evolved into new niches where flying was no longer necessary. This may have been in response to limited resources. For example, the flightless cormorant can no longer fly, but its wings are now adapted to swim in the sea ( Figure 1.4).
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birds
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FIGURE 1.4
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blood pressure
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FIGURE 1.1
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centipedes and millipedes
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FIGURE 1.1
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choosing healthy foods
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FIGURE 1.1
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choosing healthy foods
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FIGURE 1.2 Compare sodium in foods like soup, bread, and frozen meals; choose the foods with lower levels. Drink water instead of drinks with high levels of sugar.
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