Answer:
The correct answer is: A) Those that are cephalized.
Explanation:
<u>The Central Nervous System is only present in animals that are </u><u>cephalized, capable of moving, and have bilateral symmetry</u>.
Cephalized animals have a proper region in their front end in which the mouth, the sensory organs and the nerve ganglia concentrate and form a "head".
An animal with bilateral symmetry has a single plane of symmetry (the sagittal plane) which divides the body into two halves: one left and one right.
Animals that are radially symmetrical exhibit a pattern around their central axis that repeats itself up to 8 times. A good example of a radially symmetrical animal is a starfish.
Answer: Mountain, small stream
Explanation:
Answer:
From the given information, the transport of glucose in blood across the red blood cells takes place by facilitated diffusion, that involves the spontaneous passive-transport with the help of trans-membrane proteins or transporter proteins to move the ions or molecules down the concentration gradient.
While the transport of glucose in intestines take place via active transport mechanism. It takes place from gut into intestines. It occurs against the concentration gradient with the help of energy molecules like proteins.
Enzymes are proteins, and proteins are basically a large chain of amino acids (polymer). So imagine when the chain is clumped into a 3D thing (see picture), it is slightly elastic (since there are spaces) and can have a bit of movement for the substrate to fit in. However, the shape is specific as it will return back to its original position once the substrate has left. Just imagine a silicone cup, when you stretch it a bit to fit a slightly larger ball in, it expands a little. When u remove the ball, it returns to its original shape. Similarly, the enzyme active site will return to its original shape but can be slightly molded for a short while, and that is what the sentence meant. It’s quite hard to explain without an actual model/ video, so if you don’t understand you can comment below!
Powerful mutagens may result in chromosomal instability,<span> causing chromosomal breakages and rearrangement of the chromosomes such as </span>translocation<span>, </span>deletion<span>, and </span>inversion<span>. Such mutagens are called </span>clastogens<span>. </span>Some mutagens can<span> cause aneuploidy and change the number of </span>chromosomes<span> in the cell. (Hope this helps you.)</span>