Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Birds and mammals have a four-chambered heart, with two ventricles and two atria, but other modern reptiles have a three-chambered heart, with just one ventricle. Paleontologists debate whether dinosaurs had a typical "reptile-like" heart or a "birdlike" heart. Long-necked sauropod dinosaurs could have had unusual circulatory demands because their head may have been raised far above their heart. The farther the head is above the heart, the greater the systolic pressure needs to be for blood to reach the brain. For example, the long-necked dinosaur Brachiosaurus may have carried its head as much as 6 m (20 feet) above its heart. It is estimated that such an anatomy demanded a systolic blood pressure of 500 mm of mercury for blood to reach the brain! Some paleontologists think this to be evidence that dinosaurs should have had a four-chambered heart that supported a dual circulatory system similar to that of birds and mammals, rather than three-chambered heart of non bird reptiles. Can you explain why?
In most biology experiments the relationship between the independent and the dependent variable can be best described as cause and effect. Describe.
What makes the principle scientifically useful or a positive thing for science? What makes a principle not methodically useful, or even a negative thing for science.
What would happen to heart rate and peripheral resistance? Would it be probable to build a working circuit without the inhibitory interneuron? If so, how would you do it? If not, why can't you do it.
What would happen if one were to inject both the R strain and heat-killed S strains into a host organism such as the mouse.
Describe about how various kinds of systematic variations in the Earth's orbit.Describe the results and give the genotype of the P.
In maize, a dominant allele (A) is essential for seed color as opposed to colorless (a). Another gene has a recessive allele (w) which results in waxy starch, as opposed to normal starch (W).
What happens if intrapleural pressure becomes equal to atmospheric pressure. McCloskey implies that evolution has displaced the need for a designer.
Clostridium and Streptococcus are both catalase-negative. Streptococcus grows by fermentation. Why is Clostridium killed by oxygen, whereas Streptococcus is not.
Explain the differences in population growth patterns of the two paramecium species. What does this tell you about how Paramecium aurelia uses available resources.
What is the gene order? What are map distances in recombination units?
As a pea plant grows, its root cells divide by mitosis. If the diploid chromosome number of the plant is fourteen, how various chromosomes will each newly formed root cell have.
A mammal uses only 1 to 2 percent of its energy in ventilation while a fish must spend about 15 percent of its energy to move water over its gills. Describe this huge difference in their efforts to collect oxygen.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd