Answer
Enzymes are proteins, which have a specific 3D tertiary structure, with a specifically shaped active site. The active site can only bind one substrate to form an enzyme-substrate complex, so can therefore only catalyse one reaction.
Explanation:
Reproduction in Fishes. Nearly all fish reproduce by sexual reproduction - the fusion of sperm produced from testes and eggs produced from ovaries. ... Fertilization is external in most fish species. Large quantities of eggs and sperm are simultaneously released into the water by females and males.
“3rd eyelid” that covers the eyes, but is transparent -- J. Watch for obstacles and prey while still protecting the eyes
<span>Long eyelashes -- E. Keep desert sand out of eyes
</span>
Eyes set on the side of the head -- I. Watch for predators approaching from the side or behind
Eyes set in front -- G. “binocular” 3D vision to better hunt prey
<span>Large amounts of body fat -- H. keep warm in an icy habitat
</span>
<span>Staying under rocks at midday -- B. keep cool in a hot habitat
</span>
Bright, colorful markings -- A. warn predators away by appearing toxic
<span>Drab, brown coloration -- D. camouflage from predators in the dirt
</span>Singing a loud, complicated song -- F. attracting more mates than others
<span>Remaining so still that breathing is not detectable -- C. prey will come right up to be captured</span>
Answer:
D. They define geological periods because scientists use them as reference points for tracking the history of the earth.
Explanation:
Catastrophic events related to changes in geological timeline are very useful in defining geological periods.
These events have very significant appearance in the geological record and can be used to determine the history of the earth.
The catastrophic events usually culminates into extinction cycles or termination of some organisms from the earth surface.
Geologists use these events that are often wide spread to delineate geological periods.
How is meiosis related to natural selection
Meiosis creates genetic variability in a population, this means that more and more organisms have different traits. Some of these traits make an organism better adapted to survive in its environment. Those with these traits are more likely to survive (natural selection).
