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andrezito [222]
3 years ago
12

Two soil types allow easy root penetration?​

Biology
1 answer:
Delvig [45]3 years ago
5 0

Answer:

dirt and soil

Explanation:

plants can grow in either tee hee

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An unlabeled hierarchical diagram of various astronomical bodies is shown. The labels A, B, C and D can be used to represent the
Sliva [168]

Answer:

Part 1:

The four astronomical bodies one could choose to represent the 4 labels in the diagram are

A - universe

B - galaxy

C - solar system

D - Mars

The universe contains galaxies and galaxies holds solar systems which have planets like Mars

Part 2: D or a planet like Mars is unlike all their other astronomical bodies it does not have other astronomical bodies within it thus, its different from rest.

8 0
3 years ago
A valid scientific investigation must be able to be
san4es73 [151]
Answer: in order for a scientific investigation to be valid A hypothesis must be tested throughout a Scientific investigation that can gather evidence and support it.

Explanation: in any scientific investigation you have to have a testable hypothesis, without your hypothesis it’s not really a scientific investigation.


Hope this helped!
7 0
3 years ago
Which planet has 27 known moons? A. Uranus B. Neptune C. Saturn D. Jupiter
ivolga24 [154]
Uranus has 27 known moons.
7 0
3 years ago
Read 2 more answers
Akeem cut his finger during an investigation, and it is bleeding slightly. Before helping him bandage the wound, which precautio
dlinn [17]

The teacher should clean the wound

Explanation:

the cut could've gotten something in it

5 0
3 years ago
Read 2 more answers
Many mutations have been identified in the lac operon. A particular mutation in the CRP gene make the CRP protein bind to the Pl
maksim [4K]

Answer:

a. + glucose, + lactose  = On

b. - glucose, - lactose  = Off

c. + glucose, - lactose  = Off

d. - glucose, + lactose = On

Explanation:

Lac operon has both types of control, repressible and inducible.

Whenever glucose level is low in the cell, an enzyme known as adenylyl cyclase raises the level of cAMP which forms a dimer with CRP protein and they both act as activator of lac operon and cause expression.

Apart from this, when lactose is present in the cell, β-galactosidase enzyme metabolizes lactose to form allolactose which causes allosteric repulsion in the lac repressor and causes its removal from the operator. As soon as repressor is removed lac operon gets activated.

In wild type lac operons, the expression of lac operon occurs when glucose level is low in the cell and lactose is present but in this mutant presence or absence of glucose will not make a difference because CRP will bind Plac promoter independent of cAMP level i.e. activator CRP will work even in high glucose concentration. If lactose is present then lac operon will always express so in option 'a & d' lac operon will express but in option 'b & c' it will not express.

3 0
3 years ago
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