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OverLord2011 [107]
3 years ago
14

The oak tree pathogen Phytophthora ramorum migrated 650 km in ten years. West Nile virus spread from New York to 46 others state

s in five years. The difference in the rate of spread is probably related to A) how lethal each pathogen is. B) the mobility of their hosts. C) the fact that viruses are very small. D) innate resistance. E) none of the above
Biology
1 answer:
miv72 [106K]3 years ago
4 0

Answer:

B) the mobility of their hosts

Explanation:

A pathogen that attacks an oak trees and a pathogen that attacks humans doesn't really have that big of a difference, but on the other side we can see that the pathogen that attacks the oak trees is spreading out much less and over much smaller territory than the pathogen attacking humans. The main reason behind this is the mobility of the host of the pathogen and where the host of it lives. In the case with the oak trees, the pathogen will be migrating very slowly over smaller distance because there's only certain places where the oak trees live, and also they are not mobile, and the pathogen will be able to spread out only through their seeds and cones which is a slow process. On the other hand, the pathogen attacking humans will manage to spread out very quickly over very large area because there are humans living in lot of places, their numbers are high, and their mobility is easy and quick over large distances, so the pathogen will travel with its host easily for hundreds or thousands of kilometers and then spread out in another place far away.

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Which of the following hormones is not produced by the anterior pituitary?
Anarel [89]

Answer:

oxytocin

Explanation:

The pituitary gland is a small gland that divides into two distinct portions, the anterior and posterior lobes, and is located at the base of the brain.

The anterior pituitary, also known as the adenohypophysis, secretes six important peptide hormones, they are:

  • The growth hormone;
  • Adrenocorticotropin;
  • The thyroid stimulating hormone;
  • Prolactin;
  • Two gonadotropic homons - FSH and LH;

Oxytocin is not a hormone produced by the anterior pituitary but by the posterior pituitary, which is known as the neurohypophysis.

7 0
3 years ago
If we have a DNA gene that reads: TACGCGTCAGGCCAA<br> The Transcribed mRNA would read?
svet-max [94.6K]

Answer:

AUGCGCAGUCCGGUU

Explanation:

A - U

T - A

G - C

C - G

3 0
3 years ago
The lower leg jolts when struck just below the kneecap. Our eyes blink shut when an object moves quickly towards our face. These
Lostsunrise [7]

I believe it's A. reflex reactions

5 0
3 years ago
If the changes are maintained as a result of stimulus, the effect is: a. Homeostasis b. Feedback response c. Negative feedback r
Volgvan

Answer:

b. Feedback response

Explanation:

Homeostasis is the ability of the system to preserve a constant state despite external inputs. Homeostasis requires the constant monitoring of internal environmental conditions in order to keep the balance of the system. Conversely, a feedback response enables to maintain a change observed in the internal conditions of a given system (for example, a living organism). This change is regulated by the interaction among different elements in the system including effectors, sensors and stimuli, which work together to maintain the feedback state.

8 0
3 years ago
Mutations and polymorphisms are both changes in a DNA sequence, but polymorphisms are more common becauseA. they less severely a
Salsk061 [2.6K]

Answer:

Option A. they less severely affect the phenotype, so that individuals can reproduce and transmit them

Explanation:

Polymorphism is the genetic variation found within a population, which favors the process of natural selection. It prefer successful traits in population.

While, mutation is the alteration of DNA sequence of an organism. Mutation can cause loss of traits in the population.

4 0
3 years ago
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