A boy on a bicycle is resting at the top of a hill. Then, he rides his bicycle down the hill. Describe how the boy's potential and kinetic energy differ at the top, middle, and bottom of the hill.

Answers

Answer 1

Answer: At the top of the hill the boy has more potential energy. In the middle he's gaining kinetic energy but losing potential energy. At the bottom he has the most kinetic energy and no potential energy at all.

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Succession performs a variety of functions within ecosystems. What is the main reason that succession is important in maintaining ecosystems?

Answers

Succession is important because it leads to mature and stable communities. The purpose of succession is for an ecosystem to reach balance state right after it is formed or after it is disturbed by man or some disasters. It will increase biodiversity and help to prevent the desertification.

Within the fluid mosaic of a plasma membrane, what is the role of transport and channel proteins?

Answers

These proteins allow substances to enter that wouldn't be able to otherwise. Only small hydrophobic substances can enter cells. However, these proteins aid crucial substsances in entering the cell.

Plants from which division are well suited to desert life?a. Gnetophya
c. Psilophyta
b. Coniferophyta
d. Lycophyta

Answers

Gnetophya are the plants which are well suited to desert life.

Answer:

Explanation:

Gnetophya

A cell is in a solution with the simple sugar glucose. The concentration of glucose outside the cell is 30%, and the concentration of glucose inside the cell is 20%. Do the following for this cell:
A)a hypotonic solution; into the cell
B)a isotonic solution; neither in nor out of the cell
C)a hypertonic solution; into the cell
D) a hypertonic solution; out of the cell

Answers

The answer is c, hypertonic solution, into the cell.

B)a isotonic solution; neither in nor out of the cell

To create a simulation of photosynthesis in a forest of 50,000 maple trees, a scientist needs to determine the average number of leaves on an actual maple tree. Which of the following is the best course of action for establishing this parameter?A. Determine the average number of leaves for 10 randomly selected maple trees.
B. Choose a value at random to represent the average number of leaves on a tree.
C. Count the number of leaves on a single tree and assume all trees are the same.
D. Divide the total number of leaves on all the trees in a forest by 50,000.

Answers

To create a simulation of photosynthesis in a forest of 50.000 maple trees, a scientist needs to determine the average number of leaves on an actual maple tree. The answer that is the best course of action for establishing this parameter is A) determine the average number of leaves for 10 randomly selected maple trees.

Answer:

Explanation:

Which level of biological classification do Mammalia and Hominidae represent, respectively?

Answers

The answer is class and family.

Taxonomic groups are used for biological classification. There are eight main taxonomic groups: domain, kingdom, phylum, class, order, family, genus and species, with the domain as the most inclusive and species as the least inclusive. If we take a look on Mammalia and Hominidae classification, we can assume that Mammalia represents class, and Hominidae represents family:

1. Domain: Eukarya

2. Kingdom: Animalia

3. Phylum: Chordata

4. Class: Mammalia

5. Order: Primates

6. Family: Hominidae

7. Genus: Homo

8. Species: Homo sapiens

Answer:

Class and Family

Explanation:

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