1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dsp73
3 years ago
6

A biologist studied a population of squirrels for 15 years. During that time, the population was never fewer than 30 squirrels a

nd never more than 45. Her data showed that over half of the squirrels born did not survive to reproduce, because of competition for food and predation. In a single generation, 90% of the squirrels that were born lived to reproduce, and the population increased to 80. Which inference(s) about this population might be true?
Question options:

a. The amount of available food may have increased.

b. The number of predators may have decreased.

c. The squirrels of subsequent generations should show greater levels of genetic variation than previous generations, because squirrels that would not have survived in the past will now survive.

d. A and B only

e. A, B, and C
Biology
2 answers:
Neporo4naja [7]3 years ago
5 0

Answer:

e.

Explanation:

<em>The correct option is e.</em>

The population of an organism is usually limited by a number of factors such as competition for food, predation, etc. Hence, an increase in the amount of available food may lead to an increase in the population of an organism. In the same vein, a decrease in the number of predator in the environment will ensure that more members of the population survive.

The population of an organism is directly proportional to the genetic variability of that population. That is, the bigger the population, the higher the genetic variability of the population and vice versa. Hence, the squirrel of he subsequent generation should show greater levels of genetic variation than the squirrels of the previous generation.

All the three options A, B, and C are correct.

Eduardwww [97]3 years ago
5 0

Answer:

d. A and B only

Explanation:

It is possible to observe a higher proportion of squirrels in a single generation for two reasons:

1-The amount of available food may have increased,  

2-The number of predators may have decreased

The statment c. is incorrect because the genetic variation will have the same value, since if population does not receive migration the unique source capable of generating new genetic variability is mutation

You might be interested in
Imagine that you are a scientist who discovered cells . If you were to give a speech to a group of fellow scientists, what key p
mariarad [96]
I would include
- The nucleus: contain genetic info
- Lysosome: clean up things
- Mitochondria: ATP factory
- Ribosome: make protein
- Cell membrane and Cell Wall: maintain and shape the cell etc
5 0
3 years ago
According to the cladogram below, which of the following organisms had a
horrorfan [7]

Cladograms are graphic representations of the relationship between different taxa according to derivated characters. Option A is correct. Group D has a segmented body and jaws, but no limbs.

<h3>What is a cladogram?</h3>

A Cladogram is a graph drown as a tree, which is based on cladistic analysis. It represents the common ancestral relationships and the emergence of different characters among the involved groups.

  • The tree-type graph is a ramified diagram that represents the relationship between the involved taxa.

  • The cladistic analysis follows the maximum parsimony criterium. Explains the character state from the point of view of the fewest changes through history.

Explains evolution with the minimal amount of evolutive changes.

It recognizes the monophyletic groups as natural groups. These groups are the clades, and their classification -sequencing- represents their phylogeny.

  • The sequencing term refers to lists of groups according to their relation. One group is the brother-group of the following one.

So the cladogram represents the relationship between groups according to a derived character.

The derivated character is any trait that a group passes to its descendants.

Through evolution, the characters change, and new changes are added. When referring to a derivate character, we mean that all the subsequent species in the cladogram carry the trait.

In the provided cladogram, segmentes bodies, jaws, limbs and other traits are derivated characters.

<u>Group D</u> has a segmented body and jaws, but does not express limbs.

This last trait emerged later in history and is expressed by groups E, F and G.

Option A is correct. Group D.

You can elarn more about cladograms at

brainly.com/question/27405768

brainly.com/question/11912782

brainly.com/question/12275760

#SPJ1  

5 0
2 years ago
An ionic bond can be formed between
love history [14]
Formed between two oppositely charged ions

5 0
4 years ago
____________ salvage excess cholesterol from cells as reverse cholesterol transport?
Soloha48 [4]
Answer is reverse cholesterol transport
8 0
3 years ago
A, B, C or D ? I really struggle in Biology.
tekilochka [14]
Carbohydrates are sugar, and the closest answer on there is A. artifical sweetener.
7 0
3 years ago
Read 2 more answers
Other questions:
  • What causes differences in air pressure? the windchill factor the horizontal movement of air the speed at which wind moves the u
    5·2 answers
  • Explain how tides form. <br> Help would be greatly appreciated! Thanks. :)
    14·2 answers
  • Explain the process of the olfactory bulb and how it affect your food choices.
    10·2 answers
  • Geologic features such as deep river valleys always take thousands of years to form true or false
    6·1 answer
  • In the human brain, a great deal of synaptic pruning occurs in the first few years of development. This pruning appears to be:
    15·1 answer
  • What is the common ancestor of canis
    7·1 answer
  • Which hazard has occurred when you are working in a grain bin and you stand on or below the “bridged” grain, causing it to colla
    12·2 answers
  • Is a cell membrane a lipid, protein, or a carbohydrates?
    9·2 answers
  • Structural changes to genes
    13·1 answer
  • Need help like now please iikkkbbb
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!