Herbaceous stem grow thicker as a result of cell division in the vascular cambium of the stem.
Expiration is when food goes bad and idk how to help sorry
Answer:
Option 1.
Explanation:
r-selected species may be defined as the species that has higher growth rate, shows less parental care and the rate of survival of the off spring is low as compared with k selected species.
Black widow spiders have the ability to produce 1000 offspring. Their chances of survival are extremely low and only few species of black widow spiders survive. Hence, black widow spider is r-selected species.
Thus, the correct answer is option (1).
Lipids are found in cell membranes in double layer which is called "Lipid-bilayer".
So, option A is your answer.
Hope this helps!
