Search found 65 matches

by Babybel56
Thu Apr 03, 2014 3:28 pm
Forum: General Discussion
Topic: biology
Replies: 1
Views: 3265

Re: biology

Photosynthesis. All of the others release CO2 back again.
by Babybel56
Fri Mar 14, 2014 4:07 am
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 4
Views: 13495

Photosynthesis requires water to happen. The water is photolysed (split apart) using the energy gained from sunlight, which will draw more up through the xylem from the roots. However more significantly for photosynthesis to take place there needs to be gas exchange through the stomatal pores predom...
by Babybel56
Fri Mar 14, 2014 4:00 am
Forum: Human Biology
Topic: Changes on our face when we grow
Replies: 4
Views: 10045

Guess it depends on the individual in question, but unlike bone cartilage will continue to grow through our lives. You have may noticed that older people have proportionally larger noses and ears since their internal structure is mostly cartilage. I guess you could use this to estimate how old someb...
by Babybel56
Wed Mar 05, 2014 3:39 am
Forum: Molecular Biology
Topic: Polymorphism and Mutation
Replies: 2
Views: 5296

Just about numbers. A mutation is a change to a single individual that may or may not be propagated. For example a single point mutation where a base is replaced or deleted from a strand of DNA. This may cause the individual some discomfort or problems but is normally isolated to the individual. A p...
by Babybel56
Tue Mar 04, 2014 6:04 am
Forum: Evolution
Topic: Humans Natural Habitat/Optimal Environment
Replies: 2
Views: 20434

It's an interesting question. The out of Africa hypothesis would apply to those ancient ancestors who once left the continent, but evolution did not stop after we left. As you mentioned your height and physical stature may make you better suited to warmer temperatures, but that isn't to say that you...
by Babybel56
Fri Feb 28, 2014 9:37 am
Forum: General Discussion
Topic: Biology tests
Replies: 1
Views: 3585

Exam boards are notoriously fickle when it comes to marks. Sometimes the way you phrase something or the keywords you use will determine whether you get marks, rather than your understanding. This is often just a method of making marking easier. In your example above, whilst you wrote about how HIV ...
by Babybel56
Fri Feb 28, 2014 9:34 am
Forum: Human Biology
Topic: Fasting and bloodsugar
Replies: 3
Views: 5802

When you eat food your body is flooded with glucose, and so insulin is produced to keep the levels relatively constant. It will peak, however, after eating food, especially if that food is rich in sugars or carbohydrates. If you fast your body will produce glucose still from your reserves - providin...
by Babybel56
Fri Feb 28, 2014 9:27 am
Forum: Botany Discussion
Topic: Why does the floem gets affected when the bark gets damaged?
Replies: 3
Views: 11008

*phloem! The phloem cells are loving cells, whilst the xylem are formed of dead cells. The xylem are on the inside of the vascular bundles, and eventually are used to create the dead heartwood at the centre of the trees. This means the phloem are always on the outside the trunk, just beneath the per...
by Babybel56
Fri Feb 28, 2014 8:55 am
Forum: General Discussion
Topic: Does other animals have faster nerve speeds?
Replies: 1
Views: 5066

The speed of nerve transmission depends on the size of the nerve axon, the length of it and whether it is effectively insulated by myelin. There are a vast number of different kinds of neurons in each animal, and for some there are more of the nice big, insulated ones for processes that need to be v...
by Babybel56
Fri Feb 28, 2014 8:49 am
Forum: Molecular Biology
Topic: reproductive sytem
Replies: 1
Views: 10207

The reproductive system, like all body systems, is interlinked. The first part of the questions might throw you off a bit. Start by thinking big. Everything in the body needs oxygen and a blood supply, both of which link to the circulatory and respiratory systems. Whilst parts are autonomous the vas...
by Babybel56
Fri Feb 28, 2014 8:42 am
Forum: Human Biology
Topic: Alzheimer's disease
Replies: 2
Views: 3559

Alzheimer's tends to affect the formation of memories, not so often previously formed ones. So if they were told something about a doctor's appointment or when somebody was coming to visit they might fail to create this memory and not recall it later. Language would have been learned a long time bef...
by Babybel56
Fri Feb 28, 2014 8:38 am
Forum: General Discussion
Topic: Would an asteroid simply just pass through Jupiter
Replies: 4
Views: 6828

Whilst Jupiter is made of gas it is not a cloud as we think of them! It's atmosphere is mostly hydrogen, but there is such pressure exerted on it that as you descend towards the core it will form a liquid, and eventually even a metallic substance! The Galileo spacecraft dropped a probe into the atmo...