BIOLOGY HIGH SCHOOL

The hypothalamus acts as a link between the nervous system and the endocrine system. TRUE OR FALSE?

Answers

Answer 1
Answer: the right answer is false

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Organism that gets food by eating other organisms

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consumer or heterotroph

What is this molecule called

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Most atoms join up with other atoms through chemical BONDS to form larger particles called molecules. They can join up with atoms of the same element or with atoms of different elements. Substances whose moleculescontain different types of atom are called compounds.

A biology class wanted to study the effect of different materials on the melting rate of ice. They placed pieces of ice, each with a mass of 10g, onto trays. Group 1 was covered in plastic, group 2 was covered in paper, group 3 was covered in aluminum, and group 4 remained uncovered.Each piece of ice was allowed to melt for 15 minutes. Then final mass of the ice, minus the melted water, was recorded at the end of the experiment.
Which of the following is the control group in this experiment?

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The control variable is a group that serves as a baseline for comparision. The independent variable is not applied or only applied at a baseline level.

The independent variable is the covering of the ice with different materials. Because group 4 wasn't covered, it is the control variable.

The control group in this experiment is group 4, which remained uncovered.

In an experiment, the control group is the group that does not receive any treatment or manipulation. It serves as a baseline for comparison to the other groups. In this case, the control group is not covered with any material, which means it is not subjected to any additional factors that could affect the melting rate of ice.

By comparing the results of the other groups (group 1 covered in plastic, group 2 covered in paper, and group 3 covered in aluminum) to the control group, the researchers can determine the effect of different materials on the melting rate of ice.

I hope this helps you. :)

How can plant crops be modified so that they do not need to be sprayed with pesticides that are also harmful to humans like normal crops are?A. They can be given human DNA so that the pests will not want to eat them.
B. They can be given bacterial DNA to produce a toxin that only works on bugs and other pests.
C. They can be given DNA to allow them to resist harsh conditions.
D. They cannot be modified to be better than organic crops.

Answers

The correct option for the modification done that needs to be sprayed with pesticides is option (b) They can be given bacterial DNA to produce a toxin that only works on bugs and other pests.

Here, we deal with the concept of genetically engineered crops, also called "genetically modified organisms" i.e., GMOs. GMOs approach the specific genes from bacteria of other organisms that produce the required toxins that are harmful only to pests that are inserted into the DNA of crops.  

GMOs are examined by crops like Bt cotton or Bt corn. They are genetically modified genes from the bacterium Bacillus thuringiensis (Bt), which are produced by the toxic proteins of certain insects. The use of genetically modified organisms is a complex issue related to the potential health effects, environmental impact, regulatory oversight, and many more.

To learn more about the 'pesticides harmful for crops' are

brainly.com/question/22936297

When pollen lands on the stigma of a flower, it grows a tube to travel down to the ovary? 1.) True 2.) false

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The answer is 1.) True.

Pollen tube used to transport pollen from the stigma of a flower to the ovary. Actually, it begins to grow when lands on the stigma. It grows until it reaches an ovule which is inside the ovary. This way it is secured that a nucleus of pollen will fuse with a nucleus of the ovule and that fertilization will occur.

Why is killing its host usually disadvantageous for a parasite?

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It leaves the parasite stranded in the host making it tough to survive!
But also nature can take it's natural course and solve the problem by
-- You Guessed It -- Mutation, adapting to the problem. By mutation 
the parasite may be able to make itself air-borne, spreading from host
to host!
sometimes the parasite might live off of the host.
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