Which kind of organism is a heterotroph? photosynthesizers producers consumers plants

The first one is correct

3 0

3 years ago

The stimulation of an inadequate number of sodium channels for the generation of a positive sodium channel feedback loop is cons

diamong [38]

Answer:

Sub-threshold

Explanation:

If the stimulus is too small to generate the action potential, it is considered as subthreshold stimulus. Subthreshold stimulus causes the opening of small number of sodium channel i.e. not enough to generate action potential because action potential is generated by complete reversal of membrane polarity. Slight depolarization is caused by subthreshold stimulus by the opening of inadequate number of sodium channel but its magnitude is not enough to reach the threshold voltage. Consequently the action potential is not generated.

The response produced by subthreshold stimulus is called as local response or local depolarization because it could not travel further. The minimum stimulus required to generate the action potential is call as threshold stimulus and stimulus greater than threshold stimulus is called as suprathreshold stimulus. It changes the frequency of generated action potential.

8 0

3 years ago

Question 28 (1 point)

quester [9]

B. xylem and phloem. they transport water and nutrients throughout the plant

7 0

3 years ago

Potential Energy on the way up the rollercoaster

Nana76 [90]

Answer: Because The potential energy you build going up the hill can be released as kinetic energy — the energy of motion that takes you down the hill. Once you start cruising down that first hill, gravity takes over and all the built-up potential energy changes to kinetic energy. Gravity applies a constant downward force on the cars.Potential energy is the energy an object has as a result of its position. Potential energy is stored energy that has not yet been released. Gravitational potential energy is potential energy that results from an object's position in a gravitational field, and is equal to the object's weight multiplied by its height.

hope this helps have a nice day❤️

Explanation:

8 0

3 years ago

There is a population of alien dogs, species Dogus Cute-ee-us, that live on the planet Woof. Their genomes and biology are amazi

kupik [55]

Answer:

c. 1:4:6:4:1

Explanation:

The term quantitative heritability refers to the transmission of a phenotypic trait in which expression depends on the additive effect of a series of genes.

Polygenic heritability occurs when a trait results from the interaction of more than one gene. And these genes can also have more than two alleles. The action of many genes and alleles can cause many different combinations that are the reason for genotypic graduation.

Quantitative traits are those that can be measure, such as longitude, weight, eggs laid per female, among others. In the exposed example, the measurable trait is the dog´s friendliness. These characters do not group individuals by any precise and clear categories. Instead, they group individuals in many different categories that depend on how the genes were intercrossed and distributed during meiosis. The result depends on the magnitude in which each allele contributes to the final phenotype and genotype. When they interact, they create a gradation in phenotypes, according to the level of contribution.

In the exposed example, each dominant allele contributes with a higher level of friendliness.

aabb → 0 = Unfriendly/Loner (although not aggressive);
Aabb, aaBb → 1 = Somewhat friendly/shy;
AAbb, AaBb, aaBB → 2 = Friendly;
AABb, aABB → 3 = Very friendly;
AABB → 4 = Maximally friendly.

Cross: between two dihybrid friendly dogs

Parentals) AaBb x AaBb

Gametes) AB, Ab, aB, ab

AB, Ab, aB, ab

Punnett square) AB Ab aB ab

AB AABB AABb AaBB AaBb

Ab AABb AAbb AaBb Aabb

aB AaBB AaBb aaBB aaBb

ab AaBb Aabb aaBb aabb

F1) 1/16 AABB ⇒ 4 = Maximally friendly

4/16 AABb + AaBB ⇒ 3 = Very friendly

6/16 AAbb + AaBb + aaBB ⇒ 2 = Friendly

4/16 Aabb + aaBb ⇒ 1 = Somewhat friendly/shy

1/16 aabb ⇒ 0 = Unfriendly/Loner

The Phenotypic ratio is 1:4:6:4:1

6 0

3 years ago