Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
from the zygote pluricellular organisms are produced by serial mitosis would this formation be possible if every cell made by mitosis had an
what is the logical order in which the concepts of atoms molecules cells up to biosphere are associatedatoms form molecules that structure cells that
are the limbs modified into wings of bats and the wings of birds examples of evolutionary analogy or homology what about whale fins compared to fish
is fecundation in mammals internal or external fecundation in mammals is internal with copulation in the contemporary world human technology is able
how do placental mammals reproduceplacental mammals reproduce sexually they have internal fecundation and they are viviparous ie their embryo creates
do all mammals have a placentamammals of the monotreme group echidnas platypus are oviparous egg-laying and they do not have a placenta mammals of
what are the three major groups into which mammals are dividedthe three groups into which mammals are divided are monotremes or prototherian eg
what are the typical features of mammalsthe typical features of mammals are body more or less covered with hair presence of the diaphragm muscle that
how different are reptiles and birds concerning the maintenance of body temperature are birds rare in polar regionsreptiles are heterothermic ie they
what are the predominating chemical compounds respectively in eggshell white and yolkthe eggshell is essentially made of calcium carbonate the white
how do birds reproducebirds like each vertebrate have sexual reproduction their embryos develop within shelled eggs having extraembryonic membranes
what similarities do birds and reptiles share regarding external coverage reproduction and excretion regarding external coverage birds are same to
which is the type of nitrogen waste birds produce why does this feature besides being an adaptation to the terrestrial environment also mean an
how is the circulatory system of birds characterizedbirds as every vertebrate have a closed circulatory system the heart is same to the mammalian
what is an example of a hypothesis which may explain why there is not a big representation of the class reptilia found in polar regionsbeings of the
concerning the maintenance of body temperature how do beings of the class reptilia classifylike fishes and amphibians beings of the class reptilia
compared to amphibians what are the two reproductive novelties of beings of the class reptilia for the survival in dry environmentscompared to
how is reproduction done in beings of the class reptiliathese beings reproduce sexually by internal fecundation by means of copulation among male and
how has the importance of the brain evolved from fishes to reptilesfrom the least to the most difficult brain structure it is evident that the brain
which is the type of nitrogen waste eliminated by beings of the class reptiliathese beings excrete mainly uric acid this substance is less toxic than
how is the circulatory system of reptiles characterized what is the basic difference among the reptile and the amphibian heartthe circulatory system
do beings of the class reptilia perform gas exchange in the same way amphibians do these beings do not have permeable skin so they do not make
compared to amphibians what is an example of evolutionary novelty present in beings of the class reptilia against the loss of water through the skin
which is the vertebrate class that is considered the first entirely terrestrialthe first totally terrrestrial vertebrate class totally independent
what are the problems that vertebrates required to solve to adapt to the terrestrial environment as they came from the aquatic habitat how evolution