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2 years ago

What is the difference between a dominant trait and a recessive trait?

1 answer:

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Dominant- determines the dominant character, more frequently found in the population, produces the complete polypeptide, does not require the presence of a similar gene, more likely to be inherited, more prone to produce diseases

recessive- responsible for the recessive character, expresses the recessive trait, produces an incomplete polypeptide, requires the presence of a similar gene, less likely to be inherited, less prone to produce disease

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List 2 ways prays can avoid predators

Jlenok [28]

Answer: Prey can avoid predators by minimizing their movement and their presence.

Explanation:

Prey minimize their presence and avoid predators by staying silent, staying in their refuge, and reduce their overall activity levels.

6 0

2 years ago

Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional

myrzilka [38]

Answer:

Air pollution harms human health and the environment. In Europe, emissions of many air pollutants have decreased substantially over the past decades, resulting in improved air quality across the region. However, air pollutant concentrations are still too high, and air quality problems persist. A significant proportion of Europe’s population live in areas, especially cities, where exceedances of air quality standards occur: ozone, nitrogen dioxide and particulate matter (PM) pollution pose serious health risks. Several countries have exceeded one or more of their 2010 emission limits for four important air pollutants. Reducing air pollution therefore remains important.

Air pollution is a local, pan-European and hemispheric issue. Air pollutants released in one country may be transported in the atmosphere, contributing to or resulting in poor air quality elsewhere.

Particulate matter, nitrogen dioxide and ground-level ozone, are now generally recognised as the three pollutants that most significantly affect human health. Long-term and peak exposures to these pollutants range in severity of impact, from impairing the respiratory system to premature death. Around 90 % of city dwellers in Europe are exposed to pollutants at concentrations higher than the air quality levels deemed harmful to health. For example, fine particulate matter (PM2.5) in air has been estimated to reduce life expectancy in the EU by more than eight months. Benzo(a)pyrene is a carcinogenic pollutant of increasing concern, with concentrations being above the threshold set to protect human health in several urban areas, especially in central and eastern Europe.

"Air pollution is causing damage to human health and ecosystems. Large parts of the population do not live in a healthy environment, according to current standards. To get on to a sustainable path, Europe will have to be ambitious and go beyond current legislation."

Explanation:

6 0

1 year ago

Read 2 more answers

Please help me with the question in the photo.

Vlad [161]

yeah it's not A because that's for one cell multiplying itself to make another one pretty much, and it's not B because is not growing from another plant so yeah I would say its C

8 0

2 years ago

Read 2 more answers

5) Strawberry plant clones are given different amounts of water for a 3-week period. First strawberry plant

Natalka [10]

Answer:

IV: Amount of water

DV: Height of the strawberry plant

CG: The fourth strawberry plant

Con: Type of strawberry plant, type of water given, type of soil used, amont of sunlight.

Explanation:

When you say independent variable this is the variable in a study that you change or manipulate. In this case, the amount of water is the one that is changing per plant. This is done to test whether this variable will have an effect on another.

The dependent variable is the variable that is not changed by the researcher or scientist. The changes in this variable is what you'd like to take note of. The changes that the dependent variable "depends" on the indepedent variable. This means that the dependent variable is the one affected. In this case, it would be the height.

Control Group is the group that you are not going to test with the Independent variable. We do this to determine or rule out any other intervening variables that may cause a change. If the result of the study would be that there is not difference between the other group and the control group, then that would mean that the independent variable may not have had any effect on the dependent variable. Another purpose to a control group is to provide also a baseline to track changes.

Controlled variables are variables that are kept constant. This is also to eliminate or prevent other variables from interfering with the results. It ensures that only the independent variable is what is causing the change. If there were no controls to this particular experiment, you will not be able to properly conclude that it is indeed the amount of water that is causing the change.

7 0

2 years ago

Describe the appearance of plateletes and state their major function. Why should platelets not be called "cells"

murzikaleks [220]

Answer:

I) Blood platelets are tiny, irregular cell fragments without nucleus. They aid in blood clotting

II) Because platelets lack nucleus

Explanation:

I) Platelets are also called thrombocytes. Their appearance is as tiny, irregular cell fragments.

Their major function is to aid the clotting of blood

II) platelets cannot be called "cells" because they lack nucleus

6 0

2 years ago