哺乳动物 【英文】
介绍猪是哺乳动物作文英文
介绍猪是哺乳动物作文英文Pigs, belonging to the Suidae family, are fascinating mammals with a rich history of interaction with humans. As mammals, they share many characteristics with other members of their taxonomic class, including being warm-blooded, having mammary glands to nurse their young, and givingbirth to live offspring. In this essay, we will delve into the world of pigs, exploring their biology, behavior, and significance to humans.Firstly, let's discuss the biology of pigs. Pigs are characterized by their stout bodies, short legs, and snouts. They are omnivorous animals, meaning they consume bothplant matter and meat. Their diet often includes grains, fruits, vegetables, and occasionally small animals. Pigs have a well-developed sense of smell, which they use for foraging and detecting food. This keen sense of smell is facilitated by their large, mobile snouts.Reproductive physiology is another fascinating aspectof pig biology. Female pigs, known as sows, typically give birth to litters of piglets after a gestation period of around three months, or 114 days. Piglets are bornrelatively immature and require care from their mother to survive. Sows are known for their strong maternal instincts and will fiercely protect their offspring.In terms of behavior, pigs are highly social animals that form complex social structures within their groups. They communicate through a variety of vocalizations, body language, and scent marking. Pigs are also known for their intelligence, ranking among the most intelligent domesticated animals. They have excellent memories and are capable of learning and adapting to various environments.The relationship between pigs and humans dates back thousands of years. Domestication of pigs likely began around 9,000 years ago in the Near East, where they were valued for their meat, fat, and ability to forage for food. Pigs have since become an integral part of many cultures around the world, providing sustenance, labor, and companionship to humans.In addition to their role as a food source, pigs have also contributed to scientific research and medical advancements. Their physiological similarities to humans make them valuable subjects for studying various diseases and conditions. Pigs have been used in research related to organ transplantation, cardiovascular health, and reproductive biology, among other areas.In conclusion, pigs are remarkable creatures with a diverse range of biological, behavioral, and cultural significance. As mammals, they share many traits with humans and other members of their taxonomic class. From their biology and behavior to their role in human society, pigs continue to captivate and intrigue us in countless ways.。
哺乳动物介绍【英文】
Order Tubulidentata
Order Pholidota
Order Xenartha
Hyrax
Order Hyracoidea
Mammalian Integument & Glands
• • • • Sebaceous Sweat Scent Mammary
Mammary Glands
Fur
• Pelage
– Underhair – Guard hairs
• 1 or 2 molts/yr
Horns
Antlers
Mammal Skull
Formation of a Hard Palate
Skull Diversification
Dentition
• 2 sets
– Milk teeth (deciduous) – Permanent teeth
• Rodents & lagomorphs
– Teeth continuously grow
Carnivore Digestive Tracts
Herbivore Digestive Tracts
ቤተ መጻሕፍቲ ባይዱ
Migratory Land Mammals
Migratory Sea Mammals
Sonar
Marsupial Reproductive Cycles
Gestational & Lactational Differences between Marsupials & Mammals
Gestation Periods • Large mammals (herbivores)
海豚
海豚(鲸类哺乳动物)海豚英文名Dolphins是与鲸鱼和鼠海豚密切相关的水生哺乳动物,大约于1000万年前的中新世进化而成,广泛生活在大陆架附近的浅海里,偶见于淡水之中。
各种海豚的长度从1.2到9.5米,重量从40千克到10吨不等,主要以鱼类和软体动物为食。
中国沿海已知有18种海豚。
海豚有着看起来友善的形态和爱嬉闹性格,在人类文化中一向十分受欢迎。
外形特征海豚是小到中等尺寸的鲸类。
体长约1.5-10米,体重50-7000公斤。
雌性通常比雄性大。
多数海豚头部特征显著,由于透镜状脂肪的存在,喙前额头隆起,又称“额隆”,此类构造有助于聚集回声定位和觅食发出的声音。
生存习性海豚在所有海洋和部分河流都有发现,它们一般生活在浅水或至少停留在海面附近,不像其他鲸类那样长时间深度潜水。
游速快并带有杂耍特征,主要以鱼类和乌贼为食,虎鲸也捕食哺乳动物,比如其他鲸类、鳍足类以及鸟类和大鱼。
像其他齿鲸一样,海豚依赖回声定位进行捕食,甚至可以用高声强击晕猎物。
有些海豚是高度社会化物种,生活在大群体中(有时超过100,000头个体组成),呈现出许多有趣的集体行为,成员间有多种合作方式,一个例子是,这些海豚群有时会攻击鲨鱼,通过撞击杀死它们。
成员间也会协作救助受伤或生病的个体。
海豚群经常追随船只逐浪前行,时而杂技般的跃水腾空,景象蔚为壮观睡眠海豚的睡觉方式比较特殊,甚至在人们眼中这根本箅不上真正的睡眠。
海豚在睡眠时,两个半球的大脑处于完全不同的状态,当一个半球入睡时,另一个半球却处于兴奋状态,并且过一段时间就左右轮换,所以经常能看到它们睁一只眼闭一只眼。
而且,在这个过程中,海脉一直在持续游动,一分钟也不停歇。
科学家认为,海豚大脑的两个半球轮流值班,是为了保证它在睡眠时能够随时应付来犯之敌及周围海水的险恶变化。
海豚就是靠它特殊的大脑功能,在不停地游动中睡觉的。
保护级别1988年12月10日列入《国家重点保护野生动物名录》,其中中华白海豚(Sousa chinensis)为国家一级保护动物,其他海豚为国家二级保护动物。
哺乳动物特征【英文】
Internal Transport
• Blood flows through a double loop circulatory system and a four chambered heart. The chambers are 2 atria and 2 ventricles.
Feeding…
• Those mammals that eat plant material will have a longer digestive tract compared to meat eaters. • They also have a rumen, which is an area to store plant material and wait to begin the digestive process (read top paragraph, page 741 elephant book)
Feeding…
• Some mammals have the cecum which is similar to the rumen but found by the intestines.
Respiration
• Mammals require a constant supply of oxygen. • Mammals have two adaptations that increase the efficiency of the lungs: the diaphragm and air sacs. • Diaphragm is a dome shaped sheet of muscle, it pulls air into the lungs by expanding the chest cavity. • Air sacs increase area for oxygen to be exchanged. • Many mammals are able to exhale air to vibrate vocal cords and produce a variety of sounds.
动物单词大全范文
动物单词大全篇(1):动物英语词汇大全【动物英语词汇大全(图)】哺乳动物,禽类,爬行动物鱼类,昆虫,甲壳动物,蠕虫等。
(欢迎补充)我要认真学习更多文章动物单词大全篇(2):关于动物的英文单词总结大全!Aant 蚂蚁ass 驴子alpaca 羊驼albatross 信天翁antilope 羚羊anteater 食蚁兽Bbat 蝙蝠bee 蜜蜂bear 熊bird 鸟bull 公牛buffalo 水牛beaver 河狸bald eagle白头鹰bird of paradise 极乐鸟giant salamander 娃娃鱼Ccat 猫crab 螃蟹camel 骆驼cow 母牛calf 小牛cock 公鸡chicken 小鸡crocodile 鳄鱼cricket 蟋蟀crane 鹤carp 鲤鱼cetipede 蜈蚣cobra 眼睛蛇crow 乌鸦cuckoo 布谷鸟crayfish 小龙虾Ddog 狗duck 鸭子duckling 小鸭deer 鹿dove 鸽子donkey 驴dolphin 海豚dragonfly 蜻蜓drone 雄蜂Eeagle鹰eel鳗鱼elephant 大象Ffish 鱼frog 青蛙fox 狐狸fly 苍蝇firefly 萤火虫flea 跳蚤ferret 雪貂Ggoose 鹅giraffe 长颈鹿goat 山羊gazelle 小羚羊grouse 松鸡grasshopper 蚱蜢grass snake 草蛇Kkitty 小猫koala 考拉kingfisher 翠鸟kangaroo 袋鼠Hhorse 马hare 野兔hedgehog 刺猬heron 苍鹰hermit crab 寄居蟹hippopotamus 河马Llark 云雀lion 狮子leopard 豹lamb 羊羔lizard 蜥蜴lobster 龙虾large prawn 大对虾locust 蝗虫ladybird 雌鸟Mmagpie 喜鹊monkey 猴子mouse 老鼠mole 鼹鼠marmot 土拨鼠mantis 螳螂mosquito 蚊子moth蛾子mallard 野鸭mare 母马Nnightingale 夜莺nanny 雌山羊Oox 牛owl 猫头鹰ostrich 鸵鸟octopus 章鱼oyster 牡蛎otter 水獭Ppig 猪panda 熊猫penguin 企鹅peacock 孔雀parrot 鹦鹉pigeon 鸽子platypus 鸭嘴兽python 蟒蛇pheasant 野鸡puma 美洲豹Qquail 鹌鹑queen ant 蚁后queen bee 蜂王Rrabbit 兔子rat 老鼠robin 知更鸟reindeer 驯鹿rattlesnake 响尾蛇rhinoceros 犀牛Sswan 天鹅swallow 燕子swallowtail 凤尾蝶sparrow 麻雀starling 八哥sheep 羊snake 蛇squirrel 松鼠spider 蜘蛛scorpion 蝎子snail 蜗牛seagull 海鸥seal 海豹shrimp 虾sardin 沙丁鱼shark 鲨鱼swordfish 剑鱼sea horse 海马sea turtle 海龟sea wrchin 海胆Ttiger 虎turkey 火鸡tortoise 乌龟tuna 金枪鱼turtledove 斑鸠Vvole 田鼠vulture 秃鹫wall lizard 壁虎Wwolf 狼whale 鲸walrus 海象woodpecker 啄木鸟worm 蚯蚓Yyellow weasel 黄鼠狼yak 耗牛Zzebra 斑马动物单词大全篇(3):各类动物的英文词汇大全,别光会看不会说!带着小朋友去动物园,想秀一下自己的英文,发现我们只记得“cat、dog...”可这些动物园里都没有呀。
牛的英文是什么
牛的英文是什么牛在中文表达中,还有姓氏的意思,在英语表达中是一种哺乳动物。
下面是给大家整理的牛的英文是什么,供大家参阅!牛的英文是什么哺乳动物:cattle; ox; moggy; moo-cow姓氏:a surname牛的英语例句1. Switzerland isn't all cow bells and yodelling, you know.你知道,瑞士不仅仅只有牛铃声和约德尔调歌声。
2. The origins of bull-riding, which serves no practical purpose, are murkier.骑牛赛没有实际意义,其起源比较令人费解。
3. The old stone cattle trough still sits by the main entrance.陈旧的石制牛食槽仍然放在大门口。
4. Outside, two old boys lingered on the street corner discussing cattle.两个老头儿在外面街角迟迟不走,聊着牛的事情。
5. I rubbed the velvety grooves inside the calf's ears.我摩挲着小牛耳朵里面柔软的凹槽。
6. Cowboys drove covered wagons and rode horses,lassoing cattle.牛仔们有的赶着大篷车,有的骑着马,抛套索捕牛。
7. He had sought work as a cowboy, rounding up cattle.他找了一份放牛的差事,负责把牛赶到一起。
8. The festival commemorates the slaying of the demon buffalo.那个节日是为了纪念杀死魔牛。
9. Take a sheet of filo pastry and brush it with melted butter.取一张擀得很薄的油酥面皮,上面刷上一层熔化的牛油。
花木兰疯狂动物城英语电影积累10个单词和3个句子英汉对照
花木兰疯狂动物城英语电影积累10个单词和3个句子英汉对照单词:prey(捕食)、savage(野蛮的)、herd(兽群,放牧)、profession(职业)、dumb (哑的)、butt(屁股,烟头)、twitch(抽搐)、Scorching(烧焦,变枯萎)、bumpkin(土包子,乡巴佬)、fuzzy (绒毛的,模糊的)、initiative(倡议,主动权)、whop(重击,打击)、moldy(发霉的)、maul(残杀,袭击)、meek(温顺的)、mammal(哺乳动物)、multitudinous ( 大量的,无数的)、actuary(精算师)、husbandry(农牧业)、musical(音乐剧,音乐的)。
英汉对照:1. Life's a little bit messy. We all make mistakes.【翻译】生活中总会有不顺心的时候,我们都会犯错。
【解析】有谁不是在一边受伤,一边学会坚强。
人非圣贤,孰能无过。
【拓展】To err is human. 人非圣贤,孰能无过。
【拓展】I was messed up for a long time. 这些年我一塌糊涂。
2. I know you'll never forgive me. And I don't blame you. I wouldn't forgive me either【翻译】我知道,你永远都不会原谅我。
我不怪你,换做我,我也不会原谅我自己。
【解析】云散因为风吹,美好因为宽容。
【拓展】Let begongs be begongs 让往事情都随风而去吧。
3. I was ignorant and irresponsible and small-minded.【翻译】我又蠢又不可靠,还心胸狭窄。
【解析】那又何妨?破锅自有破锅盖,破人自有破人爱。
喜欢你的人什么都愿意宽容和原谅。
【拓展】The more you learn, the more you feel ignorant. 博学才知才疏学浅。
水生类哺乳动物【英文】
Cetaceans
• This is the largest group of Marine Mammals, consisting of Whales , Dolphins, and Porpoises. • These, of all the Marine Mammals, have made the most complete transition to aquatic life. • These animals spend their entire lives in the water. • They are streamlined, and look remarkably fish-like. • They breathe air through lungs and have nostrils on the tops of their heads called a blowhole (some single, some double).
Walruses
• Have large protruding tusks for digging up mollusks. They love to eat clams! • They have stiff whiskers for feeling around on the ocean floor. • They are the largest Pinneped, weighing up to 2700 lbs!
Pinnepeds
• Pinnepeds are marine mammals that have flippers and blubber, that need to breed on land. • Seals, Walruses, and Sea Lions all belong to this Order. • Pinnepeds live in cold water, they have a thick layer of blubber to keep them warm. • They are mostly carnivores and feed on squid and fish. • They have streamlined bodies and are excellent swimmers. • Seals are the largest group of pinnepeds.
两栖动物VS哺乳动物【英文】
Amphibians
• Amphibians have advanced, complex body systems.
STERNGRR
• What do animals synthesize?
• Proteins, Lipids, Nucleic • Acids, • Large Carbohydrates
Respiratory System
• Frogs have a lung and a tongue that pushes air in. • They also breath through their moist skin by diffusion. It has to be moist.
• Why is it an advantage to have two methods of respiration?
Digestive System
• Tongue, throat, stomach (churning and digesting), small intestine (digesting and absorbing), large intestine (absorbing water solid waste storage). • Liver, gall bladder – puts bile into stomach. • Pancreas – puts digestive enzymes into intestine. • Villi – small finger like projections in the small intestine that allow for greater absorption of nutrients. • Large intestine empties solid waste from the cloaca.
哺乳动物
哺乳动物科技名词定义中文名称:哺乳动物英文名称:mammals定义:中华尖齿兽、摩根齿兽类、柱齿兽、三尖齿兽类、单孔类、异兽类、后兽类和真兽类的冠群。
其骨学及牙齿特征为:脑颅扩大,鳞骨-齿骨结合,内耳仅由岩骨包裹及扩展的耳蜗和岬,隅骨、关节骨进入中耳成外鼓骨和锤骨,双生齿,臼齿列具有准确的咬合关系。
所属学科:古生物学(一级学科);古脊椎动物学与古人类学(二级学科);哺乳动物(三级学科)本内容由全国科学技术名词审定委员会审定公布百科名片哺乳类动物图片哺乳类动物(Mammal)哺乳类是一种恒温、脊椎动物,身体有毛发,大部分都是胎生,并藉由乳腺哺育后代。
哺乳动物是动物发展史上最高级的阶段,也是与人类关系最密切的一个类群。
中文名:哺乳动物外文名:Mammal 别名:哺乳纲代表作品:纲: 哺乳纲Mammalia 界:动物界Animalia 门:脊索动物门Chordata 亚门:脊椎动物亚门Vertebrata 下门:有颔下门Gnathostomata 总纲:四足总纲T etrapoda目录哺乳动物的主要特征1皮肤(1)皮肤的结构完善1(2)皮肤的衍生物多样1骨骼(1)中轴骨骼1(2)附肢骨骼肌肉1消化(1)消化管1(2)消化腺1呼吸(1)鼻腔1(2) 喉1(3)气管1(4)肺和胸腔1循环(1)血液1(2)心脏1(3)血管1(4)淋巴排泄神经(1) 新脑皮(2)间脑(3)中脑(4)小脑(5)延脑(6)智商感官(1)嗅觉(2)视觉内分泌生殖(1)雄性生殖腺(2)雌性生殖腺分类哺乳动物的代表动物哺乳动物之最《哺乳动物》图书内容简介目录展开编辑本段哺乳动物的主要特征哺乳动物具备了许多独特特征,因而在进化过程中获得了极大的成功。
最重要的特征是:智力和感觉能力的进一步发展;保持恒温;繁殖效率的提高;获得食物及处理食物的能力的增强;体表有毛、胎生,一般分头、颈、躯干、四肢和尾五个部分;用肺呼吸;体温恒定,是恒温动物;脑较大而发达。
动物分类(英语)
English Tips five(外教口语班专用资料)Name_______Animal Classification动物的分类1、Mammals(哺乳动物):warm blooded,give birth,give milk,teeth. Examples :_________老虎,_________狗,_________大象,_________熊猫,_________长颈鹿,_________狮子,_________猩猩,_________猪,_________牛,_________马。
2、Reptile(爬行动物):cold blooded,lay eggs,scales.Examples :________蛇、_________壁虎、_________蜥蜴、_________乌龟、_________海龟、_________鳄鱼,_________变色龙3、Birds(鸟类):can fly,lay eggs,feather,beak,light bone. Examples :____猫头鹰,_________鹦鹉,_______乌鸦,_________白头翁,________企鹅,________孔雀,__________鸡,________鸭,__________鹅4、Fish(鱼类):live in water,lay eggs,cold blooded.Examples :_________海马,_______鲨鱼,_______鲤鱼,________金鱼__________罗非鱼,______三文鱼5,Insects (昆虫类):lay eggs,6-8legs,exoskeleton(外骨骼)Examples :__________蟑螂,_______蜜蜂,________蚂蚁,_________蝴蝶__________蜻蜓,__________苍蝇、__________蚊子另外还有:amphibian(两栖动物),mollusk(软体动物),crustacean(甲壳类动物)英语时间表达法一整点的表达:o’clock 前用数字或文字均可。
哺乳纲
最高等的脊椎动物——哺乳纲(【拉丁文名称】:Mammalia 【英文名称】:mammals )脊椎动物亚门的一纲,通称兽类。
哺乳动物是全身披毛、运动快速、恒温胎生的脊椎动物,是脊椎动物中躯体结构、功能行为最为复杂的最高级动物类群。
身体被毛;体温恒定;胎生(单孔类例外)和哺乳;四肢经扭转位于身体的腹面;头骨合颞窝型,具完整次生硬腭和肌肉质软腭;具有肌肉质横膈;中耳具有3块听骨;下颌由1块齿骨构成,与头骨为齿-鳞骨关节式; 7个颈椎,第1、2颈椎分化为环椎和枢椎;完全的双循环,红细胞无细胞核;肺泡是气体交换最终场所。
兽类是动物界进化地位最高的自然类群,除南极、北极中心和个别岛屿外,几乎遍布全球,现存19目123科1042属4237种。
中国有11目,都是有胎盘类。
中国北方属古北界,哺乳纲的代表科有鼠兔科、河狸科、蹶鼠科、跳鼠科、睡鼠科,南方属东洋界,代表科有长臂猿科、懒猴科、大熊猫科、灵猫科、鼷鹿科、穿山甲科、狐蝠科、象科、猪尾鼠科、竹鼠科等。
哺乳动物(包括化石和现生种类)可分为原兽亚纲、后兽亚纲和真兽亚纲。
原兽亚纲包括已绝灭的中生代哺乳动物和现在的单孔目。
单孔目中有针鼹和鸭嘴兽,产于澳大利亚、塔斯马尼亚和新几内亚,现存只有1目2科3属6种。
后兽亚纲,包括各种有袋类,产于南、北美洲、澳大利亚及其邻近岛屿,共1目 9科81属约 250 种;真兽亚纲,包括各种有胎盘类,广布世界各地。
除已绝灭的目外,共17目112科,约958属3981种。
原兽亚纲Prototheria(单孔类),哺乳类中唯一产卵的动物。
单孔类具有单一的泄殖腔孔和体外相通,用于产卵、排遗和排泄。
大脑半球不发达,无胼胝体。
体温在26—35度之间波动,有乳腺但无乳头。
后兽亚纲Metatheria(有袋类),此类动物在腹部有育儿袋。
胎生,但是无真正的胎盘,产出的胎儿发育不完全,必须在育儿袋中继续发育。
此外,有袋类的大脑半球仍不发达,无胼胝体,体温在33—35度之间波动。
用十句话介绍羊英语
用十句话介绍羊英语以下是十句关于羊的英文介绍以及对应的中文翻译:1.Sheep are a species of domesticated mammal, typically raised fortheir wool, meat, and milk.中文翻译:羊是一种被驯化的哺乳动物,通常被饲养用于获取羊毛、羊肉和羊奶。
2.They are social animals and often graze together in flocks.中文翻译:羊是群居动物,经常成群结队地一起放牧。
3.Sheep are known for their docile and gentle nature, making themeasy to care for.中文翻译:羊以温顺和温和的天性而闻名,使得它们易于照料。
4.The wool from sheep is used in a variety of textiles, including clothing,blankets, and rugs.中文翻译:羊毛被用于制作各种纺织品,包括衣服、毯子和地毯。
mb, the meat of young sheep, is a popular dish in many culturesand is often served roasted or grilled.中文翻译:羊肉,即小羊羔的肉,在许多文化中是一道受欢迎的菜肴,经常被烤或烧烤后食用。
6.Sheep's milk is used to make a variety of dairy products, includingcheese, yogurt, and ice cream.中文翻译:羊奶被用来制作各种乳制品,包括奶酪、酸奶和冰淇淋。
7.Sheep are sheared regularly to remove their wool, which growscontinuously.中文翻译:羊需要定期剪毛,因为它们的羊毛会持续生长。
《疯狂动物城》里动物的英文表达你知道嘛?
《疯狂动物城》里动物的英文表达你知道嘛,最近想必大家一定被一部电影刷爆了屏,对,就是传说中的《疯狂动物城》,英文为"Zootopia",即“动物园”的"zoo"和“乌托邦”的utopia的混合体。
那么大家又对这些动物英文名称知多少捏,在《疯狂动物城》中,大概有不少于50种动物登场。
下面,来扒一扒这些毛茸茸的动物们吧~首先,影片有个设定,这是个拟人化哺乳动物的世界,而哺乳动物中又分肉食系和草食系。
拟人化:anthropomorphic哺乳动物:mammal肉食系动物:predator草食系动物:prey-predator(电影中出现);也作herbivore现在,我们的女主人公,水汪汪紫色大眼睛的兔朱迪警官登场啦~家兔 rabbit为了强调她的平凡,她的设定就是一只普通rabbit,不是什么" 垂耳兔",虽然自带垂耳功能。
赤狐 red fox有着邪魅狂涓霸道总裁般的眼神,狡猾 smooth/sly,擅长诈骗hustle 注意:"hustle"连续出现三次,分别为“快点”、“诈骗”、“欺骗”,最后这个有点“智取”的感觉,观影时候不妨细细体会。
fox 耳廓狐另一只狐狸Finnick,为耳廓狐,又称沙漠狐,是世界上最小的犬科动物;,看似小巧可爱,但开口跪系列。
树懒 sloth神似“思聪老公”的闪电Flash,是一只树懒,来跟小编念,"shu lan",不是"shu ta"哦~它们在真实的动物世界里也是萌萌哒~这里还埋有一枚彩蛋,Flash 的女盆友Priscilla的配音是《冰雪奇缘》里的安娜公主声优Kristen Bell~水獭 otter这只楚楚怜人的水ta(不是lan),为北美水獭 North American riverotter。
鼩鼱 shrew电影迷的小伙伴们,一定会清楚这扮相及口音,咦,这不是《教父》里的马龙白兰度嘛,哦,不对,是白兰鼠。
介绍猪是哺乳动物作文英文
介绍猪是哺乳动物作文英文Pigs are mammals that belong to the family Suidae. They are known for their stout bodies, short legs, and snouts. Pigs come in many different breeds, each with their own unique characteristics and purposes.One of the most common uses for pigs is as a source of meat. Many cultures around the world consume pork as astaple in their diets. Pigs are also used for their hides, which can be turned into leather, and their bristles, which are used to make brushes.Pigs are intelligent animals and are often kept as pets. They are known for their playful and curious nature, andcan form strong bonds with their human owners. Pigs arealso used in therapy programs for people with disabilitiesor mental health issues.In the wild, pigs are omnivores and will eat almost anything they can find. They are also known for theirrooting behavior, where they use their snouts to dig up the ground in search of food. This behavior can be destructiveto crops and natural habitats, which is why some areas have implemented measures to control wild pig populations.Overall, pigs are fascinating animals that have played an important role in human history and continue to be a valuable resource today. Whether as a source of food, a pet, or a therapy animal, pigs have a special place in ourhearts and in our lives.。
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A feature that is present in most female mammals, but not male mammals, is
1. generating body heat internally. 2. subcutaneous fat. 3. the ability to nourish young with milk. 4. breathing air.
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The three main groups of mammals are the
1. 2. 3. 4. monotremes, marsupials, and placental mammals. platypuses, echidnas, and marsupials. rodents, carnivores, and primates. kangaroos, koalas, and wombats.
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The first true mammals appeared during the
1. Permian Period. 2. late Triassic Period. 3. Cretaceous Period. 4. Cenozoic Era.
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The earliest mammals
1. 2. appeared about 65 million years ago and had simple teeth. were large and resembled modern elephants. were small and probably were most active during the daytime. probably were nocturnal and ate insects.
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In mammals, the amount of water in the body is controlled mainly by the
1. 2. 3. 4. kidneys. diaphragm. heart. lungs.
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Mammals are characterized by each of the following EXCEPT
1. 2. 3. 4. mammary glands. hair. endothermy. three-chambered hearts.
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The volume of the chest cavity increases when
1. the rib cage lowers. 2. air leaves the lungs. 3. the diaphragm contracts. 4. the bottom of the chest cavity moves upward.
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Mammals that have baleen feed on
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Which body system includes the rumen?
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3from their bodies when necessary, some mammals use their
1. 2. 3. 4. external body hair. subcutaneous fat. sweat glands. high rate of metabolism.
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Which organ is used by a cow to feed her newborn calf?
1. 2. 3. 4. mammary gland placenta marsupium rumen
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To determine whether a vertebrate is a bird or a mammal, it would be useful to know if it 1. has a fourchambered heart. 2. breathes air. 3. has hair. 4. is an endotherm.
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The mammalian circulatory system consists of
1. 2. one loop powered by a fourchambered heart. two separate loops powered by a fourchambered heart. two separate loops powered by a three-chambered heart. four separate loops powered by a twochambered heart.
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Which part of a mammal’s brain contains a well-developed cerebral cortex—the center of thinking? 1. medulla oblongata 25% 25% 25% 25% 2. spinal cord 3. cerebrum 4. cerebellum
1. 2. 3. 4. respiratory circulatory excretory digestive
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Which sequence correctly describes the path of newly swallowed plant food through the digestive tract of a cow?