BIOLOGY HIGH SCHOOL

Which of these is responsible for ridding the body of waste?A) nervous system
B) Excretory System
C) Circulatory System
D) Reproductive System

Answers

Answer 1
Answer: My best guess would be B) because waste "excretes" out of the body
Answer 2
Answer: The  Excretory System sounds about right. Circulatory is with you lungs and heart and that kind of stuff and the other ones i dont think are right.

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When the Linnaean system of classification was first developed in the early 1700s, it only had two kingdoms for living things, the plant and animal kingdoms. Three more kingdoms have been added since then, as well as a higher division of three domains. Why are we still using this system if we have to keep changing the way it is organized?
Golgi bodies are organelles that process and package macromolecules, such as proteins and lipids, for export out of the cell. Given this information, which of the following types of cells is most likely to possess a large number of Golgi bodies? gland cells heart cells red blood cells muscle cells
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Which of the following chemical reactions proves the fact that the products of photosynthesis are reactants of respiration?Photosynthesis: Respiration: Photosynthesis: Respiration: Photosynthesis: Respiration:

What is the foundation to relative dating

Answers


Radioisotopes decay at a constant rate.

Which of the following events happens first in the development of a new organism? A. A zygote undergoes mitosis.
B. A sperm fertilizes an egg to form a zygote.
C. A blastocyst implants into the uterine wall.
D. A morula is formed.

Answers

It's C. A blastocyst implants into the uterine wall.

This international agreement helped to reverse ozone depletion.Kyoto Protocol
Montreal Protocol
An Inconvenient Truth
Declaration of Independence

Answers

The Montreal Protocol agreement helped to reverse ozone depletion.

Answer: Option B

Explanation:

The stratospheric ozone layers safeguards the Earth against harmful ultraviolet radiation which cause skin cancers and cataracts to humans, as well as physiological hazard to animals and all plants.

With the increase in signs of ozone depletion, government has ratified the Montreal Protocol, a global agreement to halt the production of harmful chemicals called chlorofluorocarbons (CFC's). At that time, CFC's were used in hairsprays, and refrigerators.

The Protocol on substances which deplete ozone layer (Vienna Convention on the Protection of Ozone Layer). This international convention aimed at protecting ozone layer by producing a large number of substances responsible for ozone depletion's.

Kyoto Protocol is the right answer since it was made for all of the nation's in the UN to follow (some didn't but some did).

The second generation phenotypes resulting from the cross of purebred monohybrid pollination will display a ratio of _____. 2:2 4:1 3:1 none of the above

Answers

The answer is 3:1.

If we imagine that plant has two alleles for the trait, we can dominant allele represent with P represents and recessive allele with p. To get purebred monohybrid in the first generation, parents must be a dominant homozygote (PP) and a recessive heterozygote (pp):

Parental generation: PP   x   pp
The first generation: Pp  Pp  Pp  Pp

Pp represents a heterozygote.
If we cross these heterozygotes:

The first generation: Pp   x   Pp
The second generation: PP  Pp  Pp  pp

If dominant allele determines the phenotype, there will be 3 plants (one PP and two Pp) with one phenotype and only 1 plant (pp) with another phenotype and vice versa.

3:1 is correct, had this question earlier

CRISPR-Cas9 technology is very innovative and made a breakthrough in biomedical science. What aspect of CRISPR-Cas9 making special from traditional PCR-based base changes? Briefly describe.

Answers

Here we go I got this for you:

CRISPR-Cas9 technology is indeed groundbreaking in biomedical science, and its key distinction from traditional PCR-based base changes lies in its precision and versatility.

**Precision:** CRISPR-Cas9 allows for highly specific and targeted modifications to an organism's DNA. It can precisely edit or replace individual DNA sequences with a high degree of accuracy. In contrast, traditional PCR-based methods are less precise and can introduce unintended mutations.

**Versatility:** CRISPR-Cas9 can be used not only to introduce base changes but also to perform a wide range of genetic manipulations, including gene knockout, gene activation, and gene insertion. It offers a versatile toolkit for genetic engineering and gene therapy applications. Traditional PCR-based methods are primarily focused on amplifying and sequencing DNA, lacking the versatility for such precise genome editing.

In summary, CRISPR-Cas9's precision and versatility make it a revolutionary tool for genetic editing, going beyond the capabilities of traditional PCR-based methods.

Review the image of the earthworm. Which of the following best describes the characteristics of the earthworm? Select all that apply (2 apply)From the Phylum Annelida
Displays Radial Symmetry
Has a true coelom
Is not segmented

Answers

The characteristics of earthworm from the listed choices are; the Phylum Annelida and also they has a true coelum. 

Earthworms are soft-bodied, segmented worms, and is only a few inches long. it is hugely important for agriculture and plays an important role in keeping soil productive, facilitating aeration, compaction and water infiltration and producing organic matter to increase crop growth. It is a segmented worm belonging to phylum Annelida, has a streamlined body with no antennae, they also have true coelum, and has circular muscles that surround each body segment among other characteristics.
 I think the correct answers from the choices listed above are the first and third options. The characteristics of an earthworm are from  the Phylum Annelida and has a  true coelom. Other characteristics are that it displays a bilateral symmetry and is segmented.
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