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NeTakaya
3 years ago
13

During the __________ trimester, the fetus can use all five senses. Answer third first second none; this happens at birthDuring

the THIRD trimester, the fetus can use all five senses.
Biology
1 answer:
Scrat [10]3 years ago
5 0
During the third trimester, the fetus can use all five senses.
You might be interested in
Why do multiple and lethal alleles often result in modifications of the classic Mendelian monohybrid and dihybrid ratios?
allochka39001 [22]

Answer:

Multiple alleles can modify the classical Mendelian ratio by increasing the number of phenotypes.  

For example, in a monohybrid cross, Mendel gets only 2 phenotypes however, in ABO blood groups (a classical example of multiple alleles) there are four phenotypes present in a population.

Lethal alleles are the alleles which when expressed result in the death of an organism. These alleles can be dominant, recessive or conditional (depends on interaction with another gene).  

Thus, lethal allele reduces the ratio of the phenotype associated with it by affecting the survival of the organism.

For example, lethal yellow allele in mice results changes the phenotype ratio from 3:1 to 2:1

3 0
3 years ago
Pls could youfactorize y²+6y-27​
Aleonysh [2.5K]
Answer:

(y+9)(y-3)

Explanation:

9*(-3) = -27
9+(-3) = 6
6 0
2 years ago
B. A family of foxes arrived on the island after the rabbits were released. No
Juli2301 [7.4K]

The carrying capacity is affected by dense dependent and dense independent factors. 1) During the fourth year. 2) Negative impact. K decreased from 200 to 100 rabbits.  

<h3>What is carrying capacity?</h3>

Carrying capacity -K- is the capability of the environment to support a growing population.

It is a constant that coincides with the population size at which natality and mortality rates are equal. This is the equilibrium point.

Commonly, environments have limited resources, and as the population grows, resources are consumed faster, leading to an increase in the competition rate.

Per capita growth rate decreases as population size, N, increases.

  • If the N < K, the population can still grow.

• When N approximates to K, the population's growth speed decreases.

• When N = K, the population reaches equilibrium,

• When N > K, the population must decrease in size because there are not enough resources to maintain that size.

The carrying capacity might be affected by limiting factors, which might be

  • density dependent (for example, competition, predation, etcetera)
  • density independent. This last case refers to dense-independent factors, among which we can mention human impact or natural disasters (fires, volcanic eruption, flooding).

In the exposed example, when referring to rabbit's carrying capacity, we can assume it is limmited by intraspecific competition and by predation.

  • <u>Population size </u><u>between the 1st and 2nd years</u>

At first we can see that during the first two years, the number of rabbits increased until it was a little bit over 200 individuals.

  • <u>Population size </u><u>between the years 2, 3 and 4</u>

During the second, third, and fourth year, the number of rabbits was kept around 200 individuals, which leads us to assume that K = 200 rabbits.

  • <u>Population size </u><u>the fourth year</u>

However, in the fourth year, there was a sharp decrease in the number of rabbits. Probably this event was due to the arrival of foxes (predators) on the island.

  • <u>Population size</u><u> after the fourth year</u>

In the presence of foxes, the number of rabbits varied around 100 (K = 100).

According to this information, we can assume that only intraspecific competition (related to resources) had a significant role during the first years.

But with the foxes' arrival, the rabbits' carrying capacity decreased from 200 to 100, meaning that, during the following years, predation strongly influenced the rabbits' carrying capacity.  

<em>1) During what year did the foxes most likely arrive? </em>

During the fourth year

<em>2) How did the arrival of the fox family impact the carrying capacity of the rabbit population on this island? </em>

Foxes had a negative impact on the foxes' carrying capacity. It decreased<u> from k = 200 to k = 100 </u>since the foxes arrival to the island.

You can learn more about carrying capacity at

brainly.com/question/2375972

brainly.com/question/14194197

#SPJ1  

4 0
2 years ago
For an x-linked gene, there are two alleles, a and
Temka [501]
So basically you have to like multiply and stuff so you would freaking get like 250 or something. 
6 0
3 years ago
30 points!!
Mamont248 [21]

My best explanation is

Some cancer is in blood and tissue and doesn’t form a tumor, such as leukemia. Therefore a usage of “chemotherapy” is needed.

Sorry if this isn’t a good explanation

8 0
3 years ago
Read 2 more answers
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