What do scientists call a plants movement toward a stimulus

1 answer:

3 0

A tropism.

A plant movement to a light stimulus is a phototropism.
A plant movement to water stimuli is a hydrotropism.

etc. etc. :)

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What are the three molecular components of cellular membranes?

kodGreya [7K]

Answer:

Lipids (50%)

Proteins (50%)

Carbohydrate portions of glycolipids and glycoproteins (10%)

Explanation:

Hope this helps :)

8 0

3 years ago

In humans, the sickle-cell trait is caused by a single defective allele, but sickle-cell disease only occurs in individuals that

In-s [12.5K]

Answer: The probability that the two children have the disease is 1/16 or 6,25%

Explanation: If the disease only occurs in homozygous individuals and the parents have the trait but not the disease that means is a recesive allele and the parents are heterozygous for this trait.

According to proportions stablished by Mendel, when there is a cross between 2 heterozygous (Ss x Ss) indivdials the probability to obtain a homozygous recesive (ss) descendant is 25% or 1/4 as shown in punnet square below:

$\left[\begin{array}{ccc}&S&s\\S&SS&Ss\\s&Ss&ss\end{array}\right]$

Taking into account that the condition of the first kid does not imply the condition for the second, it should be analyzed as 2 independent events.

1. First kid has 1/4 of probability have the dissease as shown in punnet square

2. For a second birth, child has the 25% chance to have the disease

The probability that both events to happen is the product of each event probabilty:

p = 1/4 * 1/4 = 1/16 or 6,25%

5 0

3 years ago

A type of cellular transport is shown. Which description best identifies this type of cellular transport? Your answer: A.Osmosis

madreJ [45]

Answer:

B.Active transport, because energy is being used to move molecules against the concentration gradient

Explanation:

Substances move in and out of living cells through various transport means. Some substances move passively (without energy) while others move actively (with energy). Active transport of substances involves the movement of molecules against the concentration gradient.

Active transport moves against concentration gradient in the sense that the movement occurs from a region which is less concentrated to one which is more concentrated, hence, energy input in form of ATP is required for such transport to occur. This is the case of the cellular transport in the diagram. Therefore, it is an ACTIVE TRANSPORT because energy input (ATP) is required.

Note, Osmosis and facilitated diffusion are types of passive transport that requires no energy to occur.

7 0

4 years ago

Which chemical process results in carbon dioxide and water? A. respiration B. diffusion C. reproduction D. photosynthesis

Dafna1 [17]

A respiration is the answer

5 0

4 years ago

Why doesn’t Jack take the conch when he invades the beach camp?

jekas [21]

Answer:

I don't understand what you are asking for