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gtnhenbr [62]
3 years ago
9

When did soft-bodied, multi-celled animals first appear?

Biology
1 answer:
MA_775_DIABLO [31]3 years ago
6 0

Answer: 550 million years ago according to the internet.

Explanation:

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Which of these would be a characteristic of an organism in the Kingdom Animalia?
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-multi-cellular
-eukaryotic
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3 0
3 years ago
Steroids are a major class of____.
Gennadij [26K]

Answer:

D

Explanation:

Additional classes of steroids include:  

Neurosteroids such as DHEA and allopregnanolone

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3 years ago
Which of the following is an example of technological progress?
Romashka-Z-Leto [24]
I think the correct answer from the choices listed above is option D. An increase in corn output resulting from genetic engineering, the invention of the air conditioner and the invention of LCD televisions are all example of technological progress. They make use of the present knowledge and making advantage of it to help the lives of people.
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3 years ago
Mrs. Gibbs cannot seem to catch up with the eating habits of her 14-year-old daughter Zondra and 16-year-old son Austin. Her wee
Alex787 [66]

Answer: The answer is 2200 calories per day for Zondra and 3000 per day for Austin

Explanation:

The options are;

a. 1800 calories per day for Zondra and 2200 per day for Austin

 b. 2200 calories per day for Zondra and 3000 per day for Austin

 c. 2400 calories per day for each of them

 d. 2000 calories per day for each of them

The answer is option B -2200 calories per day for Zondra and 3000 per day for Austin

Calories provide energy which we use to perform daily activities. The calories derived from food allow us take part in important activities and leisure. Calorie needs are often higher during teenage years because it is the time of rapid growth.

Austin, is her 16 year old son. The recommended calorie needs for adolescent males between the ages of 16- 18 are; 2,400 calories for non active adolescents, 2,800 calories for moderately active adolescents and 3200 calories for active adolescents.

Zondra is a 14 year old female adolescents. The recommended needs for adolescent females between the ages of 14-18 are; 1,800 calories for non active adolescent females, 2,000 calories for moderately active and 2,400 calories for active adolescent females.

Option B, 2200 calories per day for Zondra and 3000 per day for Austin  fall within the range

3 0
3 years ago
What facilitates passive transport across a cell membrane
maw [93]

The answer is concentration gradient. Have a good day.

5 0
3 years ago
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