Is a tissue a part of a cell?

The smallest contracting unit of a skeletal muscle is

serious [3.7K]

The answer would be the muscle fiber because it's the small part of the contracting unit.

6 0

4 years ago

The survival of some plants depends on their ability to have seeds transported to a favorable environment. Describe three differ

taurus [48]

Answer:

Different plants have different strategies for the dispersal of seeds. It dependents upon the environment in which they are growing. The three different ways of seed dispersal are:

1. Gravity: As, the fruits in the seeds gets ripen, they fall from the trees or plants because of the action of gravity acting on them. This mechanism is called as abscission. The seeds gets ejected or comes out of the fruit after degradation and decomposition of the fruit.

2. Wind and water: Wind and water are two agents which facilitates the transfer of seeds from one location to the other location.

3. Animals and birds: The animals and birds consume fruits along with seeds. They leave the seeds to different location, in the form of whole seed, partially consumed fruit or in the form of seed present in their biological waste.

8 0

4 years ago

Read 2 more answers

In trout, Gene A affects body color and yellow color (allele a) is recessive to red. In a particular river system you find that

hjlf

Answer:

The frequency of the dominant A allele is 0,4 or 40%.

Explanation:

In this population, we have:

- "A" red body color Dominant

- "a" yellow doy color Recessive

So, individuals AA and Aa will be red and trouts aa will be yellow. In this case, 64% of the fish are red, so they are AA or Aa.

If the population is in Hardy-Weinberg equilibrium the following will be true:

$p^{2}+2pq+q^{2}=1$

Where:

$p^{2}=$ frequency of AA

$2pq=$ frequency of Aa

$q^{2}=$ frequency of aa

It is known that 64% of population is red, in other words:

$p^{2}+2pq=0,64$

Or AA+Aa=0,64

So, it is possible to find the value of $q^{2}$ (aa):

$p^{2}+2pq+q^{2}=1$

$(0,64)+q^{2}=1$

$q^{2}=1-0,64$ $q^{2}=0,36$

Now, there are two alleles in this population, therefore their frequencies will be:

$p+q=1$

So, from $q^{2}$ it is possible to find q and p:

$q=\sqrt{q^{2} }$

$q=\sqrt{0,36}$

$q=0,6$

And:

$p+q=1\\p=1-q\\p=1-0,6\\p=0,4$

7 0

3 years ago

Which part of the photoreceptors contain the photo pigments?

RUDIKE [14]

There are 2 types of photoreceptors rods and cones they react to light in different ways.

Rods-
Respond to low levels of light and are primary responsible for night vision.
They are poor at detecting fine details in an image and are not involved in colour vision.

Cones-
Respond to high levels of light and are primary responsible for our vision in well-lit conditions.
They detect fine details and are responsible for colour vision.

7 0

3 years ago

The enzyme pepsin is produced in the cells of the stomach but not in the cells of the small intestine. The small intestine produ

kkurt [141]

Answer:

D) Expressed in the stomach, but not in the cells of the small intestine

Explanation:

6 0

3 years ago