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tangare [24]
3 years ago
10

State one reason why an individual’s pulse rate increased during exercise.

Biology
1 answer:
shusha [124]3 years ago
4 0
Blood needs to flow faster around the body in order to supply the muscles with oxygen for respiration
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If you have just eaten, your body secretes ______ to uptake glucose; if you have not eaten all day, your body secretes ______ to
pav-90 [236]
If you have just eaten, your body will secrete insulin. Insulin is the hormone that allows glucose to enter cells. That way they will have the proper energy for their normal functions.
If you have not eaten for a while, your body is running out of glucose to feed the cells so it needs to secrete another hormone called glucagon. This hormone is the complete opposite of insulin because it breaks down glycogen, proteins and fats into glucose.
6 0
3 years ago
What are the free sites to learn biology for grade 8?
julsineya [31]

Answer:

CK12, bioninja, and amoeba sisters on yt

Explanation:

They are really helful!!

6 0
3 years ago
Read 2 more answers
A population of wolves predates a population of moose on Isle Royale, Michigan, where there are fewer wolves than moose to start
andrew11 [14]

Complete question:

A population of wolves predates a population of moose on Isle Royale, Michigan, where there are fewer wolves than moose to start. The wolves prey on the moose and eat well, allowing them to have abundant offspring. However, as the wolf population rises, the moose population drops, and over time, the wolf population begins to drop also because of the reduced availability of resources. As the wolf population drops, moose are able to better survive and reproduce, causing the moose population to rise. With this abundance of moose, the wolf population is able to rebound until their population exceeds the moose population’s ability to support the number of wolves. Which population dynamic does this series of oscillations represent?

  1. Delayed density dependence
  2. Delayed density independence
  3. Extinction vortex
  4. Carrying capacity

Answer:

  1. Delayed density dependence

Explanation:

The Delayed density dependence occurs when two species are in interaction (prey-predator or parasite-host), and the dynamic of each population follows the dynamic of the other population. The natality and mortality rates of one species follow the rates of the other species.

<em>Delayed density dependence dynamics regulate populations and allow the occurrence of equilibrium or balance in nature.</em>

<u>Predator-prey scenarios</u>

Assuming that the prey lives in the ideal environment with no predators, it shows an exponential growth rate. Prey can grow, develop, and reproduce, increasing its population size. The more available items, the more predator there will be. The predator population increase in size, and its presence affects the prey populations, leading it to decrease. So there are fewer available items to prey on.    

The prey population also affects the predator population. After the increase in the predator population size, the number of available prey decreases. The predator lives in an ideal environment but depends on the prey density. The more predators there are, the fewer prey there will be left. The predator population decreases exponentially due to the item's lack. The predation rate depends on density as well as natality and mortality rates.

So, to sum up,

  1. prey population increases in size
  2. predator population increases in size
  3. prey population decreases in size
  4. predator population decreases in size

In this particular example, the wolves population follows the moose population and vice-versa. It is not simultaneous. It happens with a delay.

<em>Moose influences the wolf population because they are their source of food. The more moose, the more wolves there are. The fewer moose, the fewer wolves there are. </em>

This is a density-dependent dynamic because both populations are affected when they reach a high value.

6 0
3 years ago
Match each item to its description.
fenix001 [56]

Answer:

An explosion of a star= Supernova

The dense remains of a star= Neutron star

A large mass of gas and dust= Nebula

Explanation:

8 0
3 years ago
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What type of biodiversity restoration are biologists practicing when they plant nitrogen-fixing plant species in an area where t
RSB [31]

Answer:

The type of biodiversity been practiced is REFORESTATION .

Explanation:

Reforestation is the deliberate or natural process by which destroyed plants are re-planted in a particular forest. Deforestation usually brings about destruction of different plants species and this normally throws the ecosystem out of balance. The negative process can be reversed by mean of reforestation, in which new plants are planted in the place of the destroyed ones.

3 0
3 years ago
Read 2 more answers
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