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Brilliant_brown [7]
2 years ago
6

What is the independent and dependent variable of sand sifting.

Biology
1 answer:
Viktor [21]2 years ago
7 0

An easy way to think of independent and dependent variables is, when you're conducting an experiment, the independent variable is what you change, and the dependent variable is what changes because of that. You can also think of the independent variable as the cause and the dependent variable as the effect.

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Which molecule is a first messenger but not a second messenger
k0ka [10]

Answer:

Hormones act as first messenger but not as second messengers.

Explanation:

Second messenger act as signaling molecule which are secreted in response to various biological signals generated by first messenger such as hormones,neurotransmitters etc.Second messengers include various bioactive molecules such as cyclic AMP(cAMP),cyclic GMP(cGMP),inositol triphosphate(IP3),diacylglycerol(DAG),calcium ions(Ca2+) etc.

         Hormones are extracellular signaling molecules whereas second messengers are intracellular signaling molecules.

5 0
3 years ago
Every time you get an X-ray how much radiation are you exposed to?​
OleMash [197]

Answer:

To put it simply, the amount of radiation from one adult chest x-ray (0.1 mSv) is about the same as 10 days of natural background radiation that we are all exposed to as part of our daily living.

6 0
3 years ago
Read 2 more answers
Green algae are more closely related to plants than they are to kelp.Why is this so?
In-s [12.5K]

Answer: Green Algae are closely related to plants.

Explanation: Green Algae are closely related to plants because of they possess photosynthetic pigments as plants.

Green algae and plants are closely related in that they can manufacture their own food from nutrients and sunlight through the process of photosynthesis

Green algae also possess the same carotenoids and chlorophyll a and b as land plants which make them closely related.

Kelps don't have these characteristics.

6 0
3 years ago
PLEASE HELP: fill in the blanks
Verdich [7]

1) metaphase 1, metaphase 2

3) meiosis, half

4) eggs, sperms

5) mitosis, same

6 0
3 years ago
Freckles is a dominant trait (FF or Ff), and the lack of freckles is a recessive trait (ff). A mother and a father who both have
Paraphin [41]
Heterozygous means both. so the answer would be Ff mom and Ff dad
3 0
3 years ago
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