BIOLOGY HIGH SCHOOL

What is an ecological system consisting of all of its biotic and abiotic factors? a. community
b. ecosystem
c. habitat
d. pure culture

Answers

Answer 1
Answer: The correct answer is b. ecosystem. An ecosystem refers to the living and non-living factors in a particular area. The living organisms like bacteria, animals and plants are the biotic factors and the non living components like soil and water are the abiotic factors.
Answer 2
Answer:

Answer:

Ecosystem

Explanation:

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How can the excessive use of fertilizers effect biodiversity if it is washed into the river

Answers

We know that fertilizier could promote the growth of the plant

When washed to the river, it will accelerate the growth of the water plant that exist within that area,
This occurrence will be not beneficial to the water animal because their habitat will be unnaturally blocked by these plants

hope this helps

15. Which of the following is not an accurate description of chemical reactions? A. The rates of chemical reactions can vary. B. Chemical reactions that take in energy never need a source of energy to start. C. During chemical reactions, energy can be released or used up. D. During chemical reactions, bonds can be broken or formed.

Answers

The correct answer is "B".
  All chemical reactions require "activation energy". Activation energy can be thought of as kickstarting a chemical reaction. If you consider lighting a match, the match does not spontaneously combust upon its removal from the matchbox. You must kickstart the reaction by heating the chemicals in the match head. This heat is generated by the friction of rubbing the match head against the side of the box.In any case, reactions that take in energy, must take that energy from somewhere, so they absolutely need a source of energy to start, and to continue!
B is the correct answer I just took the test

A plant with the genotype TT is called _____.
homozygous
heterozygous
hybrid

Answers

This would be a homozygotous plant!

Homozygotous refers to the fact that both genes for a certain characteristics are identical. Heterozygotous refers to the fact that the two genes are slightly different. TT means that both genes are the same, so it's homozygotous!

Answer: The correct answer for the blank is-  

homozygous.

Genotype TT represents the genetic makeup of an organism with respect to one particular trait ( let us consider tall height of pea plant).

Homozygpous genotype is the one that contains same variants ( allele) of a gene whereas heterozygous genotype contains two different alleles ( such as Tt).

In this question, genotype TT contains two T alleles ( which are dominant as represented with capital letter). This genotype which will exhibit dominant trait such as tall height of pea plant.

Mr. Potter’s physical science classes conducted an experiment to determine the density of aluminum. Here are the density values each class period came up with: 1st hour = 3.1 g/ml, 2nd hour = 3.05 g/ml, 3rd hour = 1.9 g/ml, 4th hour = 2.35 g/ml, 5th hour = 4.2 g/ml, and 6th hour = 4.0 g/ml. If Aluminum’s true density is 2.7 g/ml, how would you group the class values based on accuracy?a.

Group: 1st, 3rd, 5th, and 6th hours, with one recorded decimal place in their values


Group: 2nd and 4th hours, with two recorded decimal places in their values


b.

Group: 3rd and 4th hours, with values under the true density


Group: 1st, 2nd, 5th, and 6th hours, with values over the true density


c.

Group: 3rd hour, with a 1 value


Group: 4th hour, with a 2 value


Group: 1st and 2nd hours, with 3 values


Group: 5th and 6th hours, with 4 values


d.

Group all classes as accurate

Answers

Answer;

B. Group: 3rd and 4th hours, with values under the true density. Group: 1st, 2nd, 5th, and 6th hours, with values over the true density.

Explanation;

Accuracy refers to the closeness of a measured value to a standard or known value.

Accuracy is a qualitative term referring to whether there is agreement between a measurement made on an object and its true (target or reference) value.

B. Group: 3rd and 4th hours, with values under the true density
Group: 1st, 2nd, 5th, and 6th hours, with values over the true density
(I just took this test)

Kelp is a kind of: brown algae fungi plant red algae

Answers

Kelp is a kind of a brown algae (Phaeophyceae). It is a cold-water seaweed also used as food and as a source of iodine. It is considered safer and better than any other chemicals for the body. It develops through sunlight and it gets nutrients and minerals from the water around it.

Which of the following groups of organs all remove metabolic wastes from the human body?

Answers

That would depend on the following.

But in general the Extretory aka the Urinary system gets rid of the waste.
group of organs are systems so it is excretory and urinary
excretory organs  are lungs, kidney, liver, skin
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