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katrin2010 [14]
3 years ago
12

Actin filaments have polarity. This means that the two ends can be identified due to structural differences. The plus end is the

end to which subunits are added more rapidly. True or False
Biology
1 answer:
Naily [24]3 years ago
4 0

Answer:

True

Explanation:

Actin is a globular protein which can polymerize to form long filaments called actin filaments. These filaments are abundant in muscle cells but are also found in other places.

While polymerizing, the new actin monomers always join the existing filament in the same orientation hence the filament becomes polar. It has a barbed end and a pointed end. Barbed end is also called plus end because monomers are added to this end five to ten times faster than the minus or pointed end. As a result, the filament overall grows in the plus end direction. Hence, the given information about actin filament is true.

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Jezelyn needs to create a project that shows geographic isolation in action and decides to make a video. Which of the following
kodGreya [7K]

Answer:

a video that shows penguin species that have different mating dances

Explanation:

The question is incomplete as it does not have the options which are:

  • a video that shows a large river that has penguin populations on both sides
  • a video that shows penguin species that have different mating dances
  • a video that shows a penguin that is laying eggs
  • a video that shows penguins in a tidal pool and an open ocean

Answer:

a video that shows penguin species that have different mating dances

<em><u>The reproductive isolation is the factor which allows the species to evolve and form a new species, therefore, this factor is used to describe a species.</u></em>

<em><u /></em>

<em><u>The reproductive isolation refers to a mechanism in which the species are isolated to not interbreed with the individual of other species. The reproductive isolation could be due to behavioural, psychological, physical or genetic differences. evolved as an adaptation.</u></em>

<em><u /></em>

<em><u>In the given cases, the penguin species which shows different mating dances is considered to be reproductively isolated as the different dance rituals evolved as behaviour to prevent them from mating.</u></em>

<em><u /></em>

<em><u>Thus, the selected option is correct.</u></em>

<h3><em><u /></em></h3>

5 0
2 years ago
HELP ASAP!! WILL GIVE 13 POINTS TO THE FIRST PERSON WHO ANSWERS THIS! AND WILL MARK AS BRAINIEST
4vir4ik [10]

Answer:

1.   As the cell size increases, the ratio of surface area to volume DECREASES

2.   It depends on the unit of the ratio 6:1. If it is in cm−1, then it means that it is similar to a cell of size 1 cm^3,  which is normally too big to get materials from the surface .

3.  A Small cell has a large surface area/volume ratio and therefore can exchange molecules with it's external environment rapidly. So, Here cell with ratio 6:1 is smaller and have ability to better transportation across it's membrane as compared to other cell with ratio 3:1

 HOPE THIS HELPS!!!

3 0
3 years ago
4. Explain the difference between a scientific law and a scientific theory.
madam [21]

Answer:

Scientific laws and theories have different jobs to do. A scientific law predicts the results of certain initial conditions. ... In contrast, a theory tries to provide the most logical explanation about why things happen as they do.

Explanation:

put this in ur own words its copied

4 0
2 years ago
Which one of the following discoveries involving DNA happened first
Ostrovityanka [42]
Oswald Avery in 1944 discoveries DNA was responsible for storing and passing information throughout generations
3 0
3 years ago
(Question is in the picture)
kramer
Higher on the outside,

because the potatoes feel heavier, that means they must contain more water, which also means they had to have sucked in some water or had more water in them to begin with.

concentration usually likes to go from high to low in order to balance things out, so the only way water could enter the cells through osmosis would be if the concentration of water were higher on the outside of the cells
5 0
3 years ago
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