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hodyreva [135]
3 years ago
13

A)what are the difference between two species of minnows?​

Biology
1 answer:
Aleksandr-060686 [28]3 years ago
6 0

Animals are often individually consistent in their behavior, not only over time, but also across different functional contexts. Recent research has focused on phenotypic and evolutionary mechanisms explaining such personality differences through selection. Parasitism and predation induce important mortality and fitness costs, and are thus main candidates to create and maintain personality differences in the wild. Here, we present data on the behavioral consistency of the Eurasian minnow (Phoxinus phoxinus) from two populations that live in different tributaries of the same river, but whose ecological environment differs fundamentally with regard to predation and parasitism. We experimentally demonstrate that individual minnow in both study populations are consistent in their boldness and activity. However, the two study populations differ notably: in the high predation and parasitism risk population fish show higher mean boldness, but tend to be less active than fish in low predation and parasitism risk population. Parasite (Diplostomum phoxini) load was negatively, but not statistically significantly, associated with fish activity level. Our study suggests that parasitism and predation are likely important agents in the ecology and evolution of animal personalities.

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Sayyid drew a diagram to compare the gravitational and
Jlenok [28]

Gravitational: A.is attractive only

Electromagnetic: C.attracts and repels

Both: D.has an infinite range

Explanation:

The two forces mentioned in this problem are:

- Gravitational force: this force is the force that is exerted between any object with mass. The magnitude of the force is given by

 F=G\frac{m_1 m_2}{r^2}

where

G is the gravitational constant

m1 and m2 are the masses of the two objects

r is the distance between the objects

This force is always attractive and it has an infinite range.

- Electromagnetic force: this is the force exerted between electrically charged objects. The magnitude of the force is given by

 F=k\frac{q_1 q_2}{r^2}

where

k is the Coulomb's constant

q1 and q2 are the charges of the two objects

r is the distance between them

This force is attractive when the charges have opposite sign and repulsive when they have the same sign. It also has an infinite range.

Therefore, we can conclude that:

Gravitational: A.is attractive only

Electromagnetic: C.attracts and repels

Both: D.has an infinite range

Learn more about gravitational and electromagnetic force:

brainly.com/question/1724648  

brainly.com/question/12785992  

brainly.com/question/8960054  

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#LearnwithBrainly

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In an animal cell these organelles are much smaller than in plant cells. What is this organelle called?
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fredd [130]
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Complete a Punnett square that shows a test cross for a tall pea plant (RR x rr). Place the plant to be tested at the top of the
shepuryov [24]

Answer:

we'll use () to indicate the different boxes

      ( )   (r)    (r)

     (R)  (Rr)  (Rr)

     (R)  (Rr)  (Rr)

You will have a 2 by 2 cell for your answer.  One set of your test (rr) will go across the top as is shown and the other will be vertical (RR) as shown.  Go down the line and put the letter you see at the top in each box and then do the same going across.

      ( )   (r)   (r)

      ( )   (r)   ( )

      ( )   (r)   ( )

      ( )   (r)   (r)

     (R)  (Rr) (R)

     (R)   (r)   ( )

I tried to make this a comprehensible as possible but just draw your diagram and put the letters in the exact order as shown and then read this.  It may make more sense that way.

Explanation:

5 0
2 years ago
Which of the following correctly explains why scientists believe that great apes like chimpanzees and gorillas are more closely
noname [10]

Scientists believe that great apes such as chimpanzees and gorillas are more closely related to humans based on the evolutionary timeline because apes are larger than monkeys and have long legs and no tails. Apes are known to have larger brains than monkeys which makes them so closely related to us. This fact cancels out B and C for the answer. Also, apes (gorillas, orangutans, etc.) are much larger than monkeys (mandrill, lesula, etc.). This right away cancels out option D. What's left is option A which features body parts and comparisons that are comparatively accurate towards humans. Hope this helped :))

3 0
3 years ago
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