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vesna_86 [32]
3 years ago
11

In radioactive dating, scientists determine the age of a fossil by

Biology
1 answer:
Lorico [155]3 years ago
6 0
Scientists establish the age of a rock or fossil based on natural radioactive decay and certain elements such as potassium and carbon, this is used to make reliable “clocks” to date ancient events.
(Sorry if not all is accurate hope it helps)
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What does matter mean?
adell [148]
Matter is everything in the known universe that has mass and takes up space. 
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3 years ago
Steroid hormones and thyroid hormones ________ pass across the plasma membrane; they cause the target cells to ________ that pro
tekilochka [14]

Answer:

can ,synthesize specific proteins

Explanation:

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They are transported in the circulatory system of the body

The action of hormones can be seen after the hormone has bound to its specific receptor found inside the cell.

For instance, steroid hormone and the thyroid hormones can pass through the plasma membrane to their receptors inside the cells.

When they bind with their receptors, the target cells will synthesize specific proteins that produce the characteristic effect of the hormone.

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3 years ago
Which of the following actions involves voluntary muscle movement?
dybincka [34]
 Making of faces - this is the correct answer in this case because the movement of either food or blood or beating of the heart for that case don't involve voluntary muscle movement. On the other hand, when're making faces, we're deliberately deciding whether we want to make a face and what face we want to make.  hope this helps :)
5 0
3 years ago
Describe the characteristic that defines members of the kingdom Plantae. Describe four characteristics that distinguish land pla
Anuta_ua [19.1K]

Answer:

1) The general characteristics of kingdom plantae are as follows −. Multicellular organisms with walled and frequently vacuolated. Eukaryotic cells. Contain photosynthetic pigments which are present in plastids. They are autotrophic mode of nutrition. Plants are non-motile, live anchored to a substrate.  Autotrophic : All plants are autotrophic, making and producing their own food and nutrients, without needing others to provide it for them.

 Multicellular : All plants all multicellular, meaning they are composed of more than one cell, which is what makes them visible to our naked eyes.

Eukaryotic: All plants are eukaryotic, meaning their cells all contain a nucleus, which is one of the organelles of the cell surrounded in a cell membrane. four characteristics that distinguish land plants from charophyte algae.

2) Alternation of generations (w/ an associated trait of multicellular, dependent embryos), walled spores produced in sporangia, multicellular gametangia, and apical meristems. These are evolved traits of land plants. Not all plants have retained these traits.

Explanation:

I added explanations inside the answer. I hope it make sense.

5 0
3 years ago
What will the temperature be after 45 minutes
Tasya [4]

Answer:

C

Explanation:

According to the trend line graph the temperature is 20°C after 45 minutes

8 0
3 years ago
Read 2 more answers
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