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3 years ago

Green algae is considered an ancestor of modern plants because

2 answers:

6 0

The answer to your question A link between green algae and land plants has been clear to biologists for. The remainder of Chlorophyta constitutes a monophyletic group. This major bifurcation in green plant evolution implies a single common ancestor to the two lineages, but, of green algal phylogeny, which is reflected in modern classification.

ahrayia [7]3 years ago

5 0

I think they have the same photosynthetic pigments because green algae and plants cells have the same kind of chlorophyl, they have similar wall cells, both make their own food during photosynthesis etc...

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What is the name of the membrane surrounding the brain? What is the function of this membrane?

wlad13 [49]

Answer and explanation:

The meninges

There are actually 3 parts—dura mater, arachnoid, and pia mater.

The brain is soft and mushy, and without structural support it would not be able to maintain its normal shape. In fact, a brain taken out of the head and not properly suspended (e.g., in saline solution) can tear simply due to the effects of gravity. While the bone of the skull and spine provide most of the safeguarding and structural support for the central nervous system (CNS), alone it isn't quite enough to fully protect the CNS. The meninges help to anchor the CNS in place to keep, for example, the brain from moving around within the skull. They also contain cerebrospinal fluid (CSF), which acts as a cushion for the brain and provides a solution in which the brain is suspended, allowing it to preserve its shape.

The outermost layer of the meninges is the dura mater, which literally means "hard mother." The dura is thick and tough; one side of it attaches to the skull and the other adheres to the next meningeal layer, the arachnoid mater. The dura provides the brain and spinal cord with an extra protective layer, helps to keep the CNS from being jostled around by fastening it to the skull or vertebral column, and supplies a complex system of veinous drainage through which blood can leave the brain.

The arachnoid gets its name because it has the consistency and appearance of a spider web. It is much less substantial than the dura, and stretches like a cobweb between the dura and pia mater. By connecting the pia to the dura, the arachnoid helps to keep the brain in place in the skull. Between the arachnoid and the pia there is also an area known as the subarachnoid space, which is filled with CSF. The arachnoid serves as an additional barrier to isolate the CNS from the rest of the body, acting in a manner similar to the blood-brain barrier by keeping fluids, toxins, etc. out of the brain.

6 0

3 years ago

What are some adaptations of the kangaroo rat that allow it to survive in the desert biome? How about the saguaro cactus?

Delvig [45]

Kangaroo Rat Adaptations
•barely have to drink H2O because they get it from their seed diet
•have excellent hearing
•back legs enable them to jump up to 2.75 meters to escape predators

Saguaro Cactus
•barely needs H2O because they have a storage pouch that collects H2O when it rains
•has 6 centimeter long spikes to warn off

3 0

3 years ago

Point mutation (like substitution)

Nastasia [14]

Answer:

a type of substitution where ect.

Explanation:

i think sorry if i'm wrong.

3 0

3 years ago

If two parents who blood types are both b produce a child that has blood type o what can you say about the parents genotypes

Leto [7]

Then, we can say the genotype of both the parents was heteroxenous... It is because, o is recessive and can dominant only in presence of other recessive gene.

So, both parents blood group genotype would be: Ib Io

7 0

3 years ago

Please answer this quick

hram777 [196]

Answer:

Group behavior, also known as collective behavior, can increase the chances for a species to survive and reproduce because they can rely on each other to accomplish behaviors that are crucial for their survival, such as hunting, migrating, and breeding.

Explanation:

According to ethologists, social species highly depend on the members of their own group for survival. One perfect example is the case of schooling fish. These small species of fish gather in a whole large group and navigate long distances while looking for food. Researchers from Princeton University discovered that their orientation capabilities increased when more individuals joined the group, making them more responsive to the environment.

Moreover, there have been numerous sources of evidence that demonstrate that orcas (killer whales), which are extremely social creatures, create large pods of around 20 to 30 individuals and 'plan' strategies to hunt. Also, older females swim along younger individuals to teach them hunting skills that are crucial for their survival.

In addition, herbivores, like zebras, are usually found in large groups because it lowers the possibilities of being individually targeted by apex predators, such as lions.

Recently, researchers have also discovered that migrating species often rely on each other to improve their migrating capabilities by producing or generating social cues that allow them to improve their orientation or in cases when environmental conditions get tough (Source).

In conclusion, these lines of evidence show that social organisms who travel in groups rely on all members to carry out important behaviors that, without them, would provoke an important decline in their populations because they wouldn't be able to reproduce or feed individually as successfully as they would with the 'help' of the members of the group.

Couzin, I.D. (2018) Collective animal migration, Current Biology 28(17), R976-980.

3 0

3 years ago