Answer:heh
Explanation:
Aluminium , mass no = no of proton + neutron = 27
atomic no = no of proton = 13
no of neutron = 27 - 13 = 14
Nitrogen , mass no = no of proton + neutron = 14
atomic no = no of proton = 7
no of neutron = 14 - 7 = 7
Helium , mass no = no of proton + neutron = 4
atomic no = no of proton = 2
no of neutron = 4 - 2= 2
fluorine , mass no = no of proton + neutron = 19
atomic no = no of proton = 9
no of neutron = 19-9 = 10
Answer:
Autonomic regulation of heart is via two reflex centers that are found in medulla oblongata
Explanation:
Medulla oblongata contain long stem that makes the upper part of brain case and this is a cone shaped structure which is responsible for autonomic regulation like controlling heart rate,vomiting,respiration,breathing etc.
The heart rate is controlled by autonomic nervous system that are mainly sympathetic and parasympathetic nervous system that releases hormones like catecholamine (epinephrine and non epinephrine) which helps in controlling the heart rate.
Medulla oblongata mainly connects the brain with the spinal cord that are responsible for responsible for the autonomic functions which contain -
Controlling the ventilation via signalling system regulated by chemo receptors which detects change in acidity of the blood.
Acts on cardiovascular centers.
Controlling the reflex centers like vomiting,coughing,sneezing,swallowing etc.
<span>Viral reproduction is termed viral replication. Viral replication is the term used by virologists to describe the formation of biological viruses during the infection process in the target host cells. Viruses must first get into the cell before viral replication can occur. From the perspective of the virus, the purpose of viral replication is to allow production and survival of its kind. By generating abundant copies of its genome and packaging these copies into viruses, the virus is able to continue infecting new hosts. Replication between viruses is greatly varied and depends on the type of genes involved. After replication of the virus has occurred, the virus will generally exhaust all the cellular resources, leading to cell death and the next step of the viral life cycle: viral shedding. However, a virus may choose, depending on the virus and environment, to instead become dormant within the cell, to emerge later. This would be deemed viral latency.</span>
Answer:
The organism can be classified in the phylum Arthropoda.
Explanation:
Arthropods are the organisms that has segmented body which mean they consist of three segments i. e. head, thorax and abdomen. They are bilateral symmetrical i. e. their body is divided into two equal parts. It consist of exoskeleton which provides protection and support to the organism's body. These organisms have jointed appendages which are attached to their body i. e. leg and arm.
Answer:
Please see below
Explanation:
The original primates' key adaptations to their arboreal life way included binocular vision to judge depth and be able to jump to the next brach without falling to a certain death; an opposable thumb, to be able to hold to a branch with a secure grip, and arms longer than legs to swing from branch to branch. This forced them to walk on all fours but it wasn't disadvantageous because they went down to the floor for short periods. During their transformation to humans which resulted from their invading a new habitat in the more open grassy savannas, the opposable thumbs allowed them to use tools, like rocks and sticks which they could use to get food and defend against their enemies. They had to walk upright on two legs, to be able to see afar and locate potential food or predators, so natural selection eventually resulted in longer legs and a modification in the backbone. The significance of this evolutionary history is that modern humans are what they are as a result of a combination of preadaptations from their arboreal ancestors and the new features that resulted from their new habitat on the open ground of the savanna.