Answer:
3 - Photoreceptors.
Explanation:
Photoreceptors are a sensor that is connected to your retina. They sense light and send the message to your brain. The sensors automatically squint your eyes if something will blind you.
The correct answer is 'photoreceptors'.
The first step in designing an experiment is the form a testable question.
<span> 2.5 million red blood cells can be destroyed every second
Hope this helps!
:D
</span>
Answer:
amoeba
Explanation:
Amoebas are organisms that are just basically jelly and a nucleus. There's an attached picture.
That "jelly" is called protoplasm; it's the fluid that makes up the amoeba's body.
Why not A: vacuoles are just protoplasm, no nucleus. they're not organisms.
Why not C: bacteria have no nucleus; they have a nucleoid region.
Why not D: a pseudopodium is an extension of an amoeba, kind of like a retractable arm.
Answer:
C) decreased functional reserve
Explanation:
Ageing is a biological process which leads to the loss of function of the tissue and cells of the organism.
The biological ageing is determined genetically and can be correlated with the chronological ageing. The ageing is also influenced by the environmental factors which could interfere with the physiology, anatomy and morphology of the organisms.
The cell division cycle gets arrested to prevent the proliferation of these damaged cells and to remove the harmful factors from the body. This leads to the loss of function of the cells and tissues.
Thus, Option-C is the correct answer.
