Describe the four-species symbiosis in leafcutter ants. What characteristics are unique to mammals? What are the characteristics that all mammals have in common? What is a distinguishing factor that separates mammals from other animals? How are plants and animals different? How are they the same?
Many young students dream about a career working with marine mammals. Although marine mammal jobs are limited and highly competitive, there are several ways to obtaining them. But, there is no magic formula to pursue a career in marine mammal science. We describe various skill sets and ...
The subphylumVertebratais the group of animals that havebackbones. Members of this group are known asvertebrates. ('Invertebrates' is a term used to describe all animals outside of this group.) Red eyed tree frogs have backbones, and are therefore in the subphylum Chordata. The gray wolf ...
" she said. "That's intuitive to us as humans who have handled a shovel in the backyard. We know that it's really hard work to shift soil. Burrowing mammals acquire a complex of features that lets them handle whole days moving soil. They make for a great case for understanding...
The original concept of pheromones came from studies of insects in the 1930s. Researchers used the term “ectohormone” to describe the hormones that insects release outside of their bodies. By the late 1950s, scientists had renamed the substances released by members of the same species as phe...
In birds and mammals, digits arise in the mitten-shaped autopod, or developing foot, which consists of two alternating regions. The digital rays, made up of cartilage and mesenchyme, become the phalanges in the adult chicken's toes. These alternate with the interdigits, also consisting of mes...
1.insects 2.plants 3.reptiles(爬行类) 4.shellfish(贝类) 5.fish 6.amphibians(两栖 Human beings 类) 7.mammals(哺乳类) Para.5 Use the sentence in the text to describe the picture: greenhouse effect They are putting too much carbon dioxide into the atmosphere, which prevents h...
课课件 Saying1Pangu_s_e_p_a_r_a_te_d__thesky fromtheearth.盘古开天辟地 Saying2Nuwamendedtheheavenand_c_r_e_a_t_e_d__humanbeings.女娲补天 Saying3God__c_r_e_a_te_d__theworldin sevendays.Saying4 ThedevelopmentofHumanfrom_m_o__n_k_e_y_Saying5LifewasbroughttotheearthbyETfrom_o_...
D.To describe what car accidents are like without seat belts.(2022·北京密云·九年级期末)My dear boys and girls, good morning. Today I’m going to talk to you about my understanding of learning history. Many of you may think it is a terrible thing to study history. You may often wonde...
The paper is the latest in a growing body of research that this form of helping behavior, previously observed in some mammals and birds, may not require complex emotion, and may, therefore, be far more widespread in nature than previously thought. ...