| Class X |
Science |
Science |
5 |
2026-27 energy. Material like sucrose is transferred into phloem tissue using energy from ATP. This increases the osmotic pressure of the tissue ca... |
|
| Class X |
Science |
Science |
5 |
is to filter out waste products from the blood. Just as CO is removed from the blood in the lungs, nitrogenous waste such as urea or uric acid are ... |
|
| Class X |
Science |
Science |
5 |
t the waste products from the blood r passintodialysingfluidbydiffusion. o The purified blood is pumped back M intothepatient.Thisissimilartothe fu... |
|
| Class X |
Science |
Science |
5 |
But some organs such as resins and gums, especially in old kidney, part of a liver, lung, etc., and tissues can bexylem. Plants also excrete some d... |
|
| Class X |
Science |
Science |
5 |
removed by the nephrons in the kidneys. ■ Plants use a variety of techniques to get rid of waste material. For example, waste material may be store... |
|
| Class X |
Science |
Science |
6 |
CHAPTER 6 Control and Coordination n the previous chapter, we looked at life processes involved in the I maintenance functions in living organisms.... |
|
| Class XI |
Mathematics |
Mathematics |
7 |
first term, (n – 1) + 1 = n in the second term and so on 0 + n = n in the last term. Thus,itcanbeseenthatthesumoftheindicesofaandb isnineverytermof... |
|
| Class X |
Science |
Science |
6 |
controlled movement must be connected to the recognition of various events in the environment,followedbyonlythecorrectmovementinresponse.Inother wo... |
|
| Class X |
Science |
Science |
6 |
body to another. Look at Fig. 6.1 (a) and identify the parts of a neuron (i) where information is acquired, (ii) through which information travels ... |
|
| Class X |
Science |
Science |
6 |
about the pain and the possibility of getting burnt, and therefore move our hand. An important question then is, how long will it take us to think ... |
|
| Class X |
Science |
Science |
6 |
course, would be at the point where they first meet each other. Nerves from all over the body meet in a bundle in the spinal cord on their way to t... |
|
| Class X |
Science |
Science |
6 |
central nervous system and the other parts of the body is facilitated by the peripheral nervous system consisting of cranial nerves arising from th... |
|
| Class X |
Science |
Science |
6 |
control these actions easily by thinking about them even if we wanted to. Do we have to think about or remember to breathe or digest food? So, in b... |
|
| Class X |
Science |
Science |
6 |
nerve impulse reaches the muscle, the muscle fibre must move. How does a muscle cell move? The simplest notion of movement at the cellular level is... |
|
| Class X |
Science |
Science |
6 |
and the other independent of growth. 6.2.1 Immediate Response to Stimulus Letusthinkaboutthefirstkindofmovement,suchasthatofthesensitive plant. Sin... |
|
| Class X |
Science |
Science |
6 |
6.2 ■ Fill a conical flask with water. ■ Cover the neck of the flask with a wire mesh. ■ Keep two or three freshly germinated bean seeds on the wir... |
|
| Class X |
Science |
Science |
6 |
when we examine the reproductive processes of living organisms. Let us now once again think about how information is communicated in the bodies of ... |
|
| Class X |
Science |
Science |
6 |
away from where they act and simply diffuse to the area of action. Let us take an example that we have worked with earlier [Activity 6.2]. When gro... |
|
| Class X |
Science |
Science |
6 |
here is a situation in which some common preparations can be usefully made in the body. These preparations should ideally make it easier to do eith... |
|
| Class X |
Science |
Science |
6 |
in one direction or the other, depending on light or gravity! But if we think about it a bit more, it will become evident that,eveninanimalbodies,g... |
|
| Class X |
Science |
Science |
6 |
of the secretion of release growth testosterone in males and oestrogen in females. hormone. Do you know anyone in your family or friends who has be... |
|
| Class X |
Science |
Science |
6 |
nervous system and hormones in our bodies. ■ The responses of the nervous system can be classified as reflex action, voluntary action or involuntar... |
|
| Class X |
Science |
Science |
7 |
CHAPTER 7 How do Organisms Reproduce? efore we discuss the mechanisms by which organisms reproduce, B let us ask a more basic question – why do org... |
|
| Class X |
Science |
Science |
7 |
chemical reactions to build copies of their DNA. This creates two copies of the DNA in a reproducing cell, and they will need to be separated from ... |
|
| Class X |
Science |
Science |
7 |
is therefore linked to the stability of populations of species. However, niches can change because of reasons beyond the control of the organisms. ... |
|