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Serhud [2]
3 years ago
14

For a behavior to evolve under the influence of natural selection, that behavior must be

Biology
1 answer:
Sati [7]3 years ago
6 0
<span>For a behavior to evolve under the influence of natural selection, that behavior must be A. directed by genes.
Genes direct everything - based on them, you will be either fit enough to survive the natural selection or not.
</span>
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One role of the pancreas is to help regulate blood glucose levels. Two types of cells in the pancreas, beta and alpha, serve as
solniwko [45]

1. Regulation of glucose blood levels is an example of negative feedback mechanism.

Negative feedback mechanism is a control mechanism involved in homeostasis maintain, in this case maintenance of glucose blood levels in normal range.

Negative feedback mechanism contains sensory system that detects the changes, control system that responds to change and activates mechanisms of effector system that reverse the changes in order to restore conditions to their normal levels.

• Pancreatic cells-sensors

• Insulin-control system

• Body cells- effector cells

2. Blood glucose levels change throughout the day because of the food consumption, but in healthy individuals levels of glucose are successfully regulated via the mechanism of hormones such as insulin and glucagon in a process called glucose blood regulation.

This tight regulation of pancreatic hormones is referred to as glucose homeostasis. Insulin lowers blood sugar and glucagon raises it.

3. If the beta cells are destroyed by an autoimmune disease (immune system attacks its own cells), there would be no insulin release, and consequently, the glucose blood levels would be increased.

Diabetes type I is a metabolic disorder caused by the destruction of insulin-producing pancreatic beta cells.


7 0
3 years ago
Match the items of column 'A' with those of column 'B':
tangare [24]

Answer:

Match the items of column 'A' with those of column 'B':

Turbidity

Reduces the light in the water column

Natural pollution

Choose

Nitrates and phosphates

Air pollution

Biochemical demand for oxygen

Contaminants into a natural environment

Chemical fertilizers

Pollution

Floating materials

Industrial wastes

Emissions pollution

Reduces the light in the water column

Concentration of hydrogen pH

Eutrophication

CFCS

New species invasion

Temperature

Harmful algal blooms

Oils fats, and foam

Please answer all parts of th Hypertrophication

Toxicity

Volcanic

In crude oil affect eggs and larvae of fish a

Atomic number

a. Hydrocarbon

3 0
3 years ago
WILL MAKE THE BRAINLIEST      How often do Solar Eclipse on Earth? options: Once every century 2 to 7 times a year Once every 40
OLga [1]
Once every century hop I helped
5 0
3 years ago
Read 2 more answers
To a taxonomist a plant is the sum total of all its characteristics.<br><br><br> A.True B. False
crimeas [40]
(True) because i remember this question very well.
8 0
4 years ago
Read 2 more answers
A species of oak tree grows in deciduous, hardwood forests. This species grows and germinates in close proximity to one another
kifflom [539]

Answer:

clustered distribution (clumped)

Explanation:

In ecology, species distribution refers to the way in which a biological taxon is spatially arranged in a particular geographic area. Species patterns of distribution are fundamental to analyze ecological systems. The main distribution patterns include 1-clustered (clumped) distribution, 2-uniformed distribution, and 3-randomized distribution. The clustered distribution is the most common type of dispersion pattern in nature and occurs when species tend to form small sets of three or more individuals clustered together. A clustered distribution may be due, for example, when resources (e.g., water) are not evenly distributed in the environment (unequal distribution of the resources). Moreover, a uniform distribution occurs organisms keep a uniform, constant, distance from each other (e.g., due to competition for limited resources), while a randomized distribution occurs when individuals are randomly distributed because resources are not limited.

6 0
3 years ago
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