Can someone tell me the last question or fill in the blank and tell me if the ones I put in are correct

jolli1 [7]

Characteristics of Lancelets:
Small
Elongated
Marine invertebrate
Lacks a jaw
No sense organs
Has a notochord
Example: Lamprey

Characteristics of Tunicates:
Marine invertebrate
Has an outer coat that is rubbery or hard
Has two siphons
Examples: sea squirts, salps

7 0

3 years ago

We consume significant amounts of what vitamin in an inactive form?

Art [367]

Vitamin A; it is a soluble vitamin in fatty bodies, which can not be released in the urine as other vitamins normally do, it is said that we consume large quantities in an inactive form since this is necessary for many human body processes such as vision, formation and maintenance of skin cells, the immune system, growth and even lactation and embryonic development, therefore it is not necessary to be active to consume large amounts of this vitamin.

6 0

3 years ago

Basic unit of a cell membrane

Crank

Phospholipids
The cell membrane is not a solid structure. It is made of millions of smaller molecules that create a flexible and porous container. Proteins and phospholipids make up most of the membrane structure. The phospholipids make the basic bag.

8 0

3 years ago

A researcher synthesizes a new molecule called inhibitor X that inhibits the activity of phosphofructokinase (PFK), the enzyme t

Oduvanchick [21]

Answer : The dissociation constant of the PFK‑inhibitor complex is, 5 µM

Explanation :

The expression for reversible competitive inhibition when apparent Km affected by addition of the inhibitor is:

$K_m_a=K_m[1+\frac{I}{K_i}]$

where,

$K_m_a$ = apparent value = 52 µM

$K_m$ = Michaelis–Menten constant = 40 µM

I = inhibitor concentration = 1.5 µM

$K_i$ = dissociation constant of the PFK‑inhibitor complex

Now put all the given values in the above formula, we get:

$52\mu M=40\mu M[1+\frac{1.5\mu M}{K_i}]$

$K_i=5\mu M$

Therefore, the dissociation constant of the PFK‑inhibitor complex is, 5 µM

7 0

3 years ago

perhaps you have heard that the greenhouse effect can cause a problem if too much heat is trapped. Extra heat is trapped because

Korvikt [17]

Answer:

In the process of photosynthesis, trees tend to take up carbon dioxide and water and convert it into oxygen and glucose. In this way, trees help in reducing the amount of carbon dioxide from the air which is otherwise a source of global warming. The process of photosynthesis also yields oxygen which is beneficial for life on earth.

The trees also store carbon inside them hence, reducing global warming. The more the trees, the more will be the chances of carbon being reduced from the atmosphere and being stored in the trees.

Plant processes like transpiration help to lower the temperature around them. Hence, more the trees, lesser will be the rise in temperature.

7 0

3 years ago