What is the function of osteoblasts in the body?(1 point)
The function of osteoblasts is to build and produce new bone tissue.
What is the function of osteoblasts in the body?(1 point)
Responses
They provide structure and support.
They provide structure and support.
They control voluntary movements.
They control voluntary movements.
They respond to changes in the environment.
They respond to changes in the environment.
They help break down food within the stomach.
They help break down food within the stomach.
They provide structure and support.
2 of 42 of 4 Items
Question
How is homeostasis achieved? (1 point)
Responses
Cells secrete stomach enzymes.
Cells secrete stomach enzymes.
Cells control voluntary movements.
Cells control voluntary movements.
Cells control involuntary movements.
Cells control involuntary movements.
Cells maintain internal stability.
Cells maintain internal stability.
How are muscle cells and bone cells similar?(1 point)
Responses
Both release sweat when the temperature gets too warm.
Both release sweat when the temperature gets too warm.
Both make it possible for you to respond to your environment by moving.
Both make it possible for you to respond to your environment by moving.
Both control involuntary movements such as the beating of your heart.
Both control involuntary movements such as the beating of your heart.
Both gather information from inside and outside the body.
Both make it possible for you to respond to your environment by moving.
Which of the following is one characteristic of all living things? (1 point)
Responses
sending cells to deliver messages in the body
sending cells to deliver messages in the body
maintaining homeostasis
maintaining homeostasis
using nerve cells to maintain temperature
using nerve cells to maintain temperature
moving from place to place
maintaining homeostasis
How have people in North Africa modified the environment to make it more suitable for farming?
People in North Africa have modified the environment in several ways to make it more suitable for farming:
1. Irrigation: They have built systems of canals and irrigation channels to bring water from rivers or underground sources to agricultural fields.
2. Terrace farming: In hilly or mountainous regions, they have built terraces on slopes to create flat areas for cultivation, preventing soil erosion and maximizing water retention.
3. Soil improvement: Through methods like crop rotation, organic fertilization, and adding amendments, they have enhanced soil fertility and productivity.
4. Desert farming: In arid regions, they have employed techniques like drip irrigation, using shade nets, and planting drought-tolerant crops to enable farming in desert or semi-desert areas.
5. Greenhouses: The use of greenhouses has allowed for controlled environments and extended growing seasons, allowing the cultivation of crops that may not naturally grow in the region.
6. Introducing new crops: They have introduced and cultivated crops that are suited for the local climate and conditions, such as date palms, olives, and various types of grains.
7. Agroforestry: Combining agriculture with tree planting has helped in soil conservation, windbreaks, and providing additional resources like fruits, firewood, and timber.
These modifications have allowed for increased agricultural productivity and the ability to sustain farming in regions that may have been challenging due to natural conditions.
How have people in North Africa modified the environment to make it more suitable for farming?
They have constructed terraces on mountainsides to create more farmland.
They have constructed terraces on mountainsides to create more farmland.
They have used slash-and-burn agriculture to enrich the soil.
They have used slash-and-burn agriculture to enrich the soil.
They have imported crops that grow well in a dry environment.
They have imported crops that grow well in a dry environment.
They have used irrigation to carry water from rivers to crops.